Gum disease is a bacterial infection of the gum tissue and the bone holding your teeth in place, and it looks different at every stage. Healthy gums are firm, pale pink, and do not bleed. Early gum disease shows up as red, puffy gums that bleed when you brush or floss. Advanced gum disease shows up as gums pulling away from the teeth, teeth that look longer than they used to, dark spaces opening between them, and teeth that feel loose.

Below we walk through what each stage looks like, how to tell which one you are dealing with, what causes it, what else can be mistaken for it, and what treatment looks like at every point along the way.

What Does Gum Disease Look Like?

Gum disease looks like red, swollen gums that bleed easily in its early form, and like receding gums, dark triangles between the teeth, and loose teeth in its advanced form. The change happens slowly enough that most people miss it until the middle stages.

Missing it is easier because the disease rarely hurts. Gum tissue that is quietly inflamed still feels normal to chew on, so appearance is the earliest reliable signal you have. The table below sets each stage against the healthy baseline, using the visual descriptions the Mayo Clinic publishes and the clinical criteria from the 2017 World Workshop on the Classification of Periodontal and Peri-Implant Diseases, co-presented by the American Academy of Periodontology and the European Federation of Periodontology. Ongoing gum inflammation is what drives every row of it.

State	Gum color	Gum shape and position	Bleeding	Below the gumline
Healthy gums	Pale pink to dark pink or brown, depending on the person	Firm, snug against each tooth, pointed between teeth	None	Attachment intact, no bone loss
Gingivitis	Bright red or dark red	Swollen, puffy, rounded edges	When brushing or flossing	Surface irritation only, no bone loss
Early periodontitis	Red to dark red	Slight recession, teeth start looking longer	Easily, sometimes spontaneously	Pockets forming, bone loss beginning
Advanced periodontitis	Red to dark purple	Clear recession, exposed roots, black triangles between teeth	Bleeding plus pus at the gumline	Deep pockets, major bone loss, loose teeth

Those four states are not a rough description. They correspond to defined stages with measurable criteria, which is how a dentist puts a name to what you are seeing.

What Do Healthy Gums Look Like?

Healthy gums are firm, fit snugly around each tooth, and do not bleed during brushing or flossing. Color varies more than most people expect. The Mayo Clinic notes that healthy gum color ranges from light pink in some people to dark pink and brown in others, and natural pigmentation is not a sign of disease. What matters is the combination: firm texture, a tight seal at the tooth, pointed tissue filling the space between teeth, and no bleeding.

What Are the Stages of Gum Disease?

The stages of gum disease are gingivitis, followed by four clinical stages of periodontitis numbered I through IV. Gingivitis is inflammation with no bone loss and it reverses completely. Periodontitis begins the moment supporting tissue and bone are actually lost, and that loss is permanent.

Permanence is the reason the staging system exists. The 2017 World Workshop classifies periodontitis by interdental clinical attachment loss at the worst site, with radiographic bone loss used when attachment loss is not available, and tooth loss caused by gum disease modifying the result. Attachment loss measures how far the gum’s grip has migrated down the root, which is a truer measure of lost support than pocket depth, since a pocket can read deep simply because the tissue is swollen. Knowing how the condition progresses over time makes the numbering less abstract.

What Are the 5 Stages of Periodontal Disease?

The five stages of periodontal disease are gingivitis plus the four clinical stages of periodontitis. The formal classification defines four periodontitis stages only, so the popular five-stage version counts gingivitis as the first. Both describe the same progression. What matters more than the count is the dividing line between them: gingivitis is reversible and everything after it is managed rather than cured.

What Is Worse, Gingivitis or Periodontal Disease?

Periodontal disease is worse than gingivitis, because it destroys bone. Gingivitis irritates the gum tissue and stops there, so daily plaque removal returns those gums to health. Periodontal disease breaks down the attachment and the bone underneath, and bone that has dissolved does not grow back on its own.

What Does Stage 1 Periodontal Disease Look Like?

Stage 1 periodontal disease looks almost like healthy gums, with slight redness and bleeding and no visible recession yet. This is the earliest point at which the diagnosis stops being gingivitis and becomes periodontitis.

Becoming periodontitis happens on paper before it happens in the mirror. Stage I is defined by interdental attachment loss of 1 to 2mm, radiographic bone loss under 15 percent confined to the coronal third of the root, probing depths of 4mm or less, and no teeth lost to the disease. A patient at this stage typically notices bleeding when brushing and nothing else, which is exactly why it goes untreated so often. Treatment at Stage I is non-surgical and highly effective.

What Are the Symptoms of Gum Disease Stage 2?

The symptoms of gum disease stage 2 are bleeding gums, mild recession, and the first sense that teeth look longer than they used to. Stage II is still treated without surgery in most cases.

Most cases respond well because the damage remains in the outer layer of bone. Stage II is defined by interdental attachment loss of 3 to 4mm, radiographic bone loss of 15 to 33 percent still confined to the coronal third, probing depths up to 5mm, and no teeth lost to the disease. Patients at this stage often report sensitivity to cold as root surface starts to show, along with bleeding that no longer improves with better brushing alone.

What Does Stage 3 Gum Disease Look Like?

Stage 3 gum disease looks like clear recession with exposed roots, dark triangles between the teeth, and gums that may release pus at the margin. The bone loss has moved past the outer layer by this point.

Moving past the outer layer changes the criteria. Stage III is defined by interdental attachment loss of 5mm or more, radiographic bone loss extending into the middle or apical third of the root, probing depths of 6mm or more, vertical bone loss of 3mm or more, furcation involvement where bone has been lost between the roots of a molar, and up to four teeth lost to the disease. Teeth may begin to feel slightly mobile. Treatment at this stage is still aimed squarely at keeping the remaining teeth, and it often succeeds.

What Does Stage 4 Gum Disease Look Like?

Stage 4 gum disease looks like significant recession, wide gaps between teeth, front teeth that have drifted or flared outward, and teeth that move when touched. Stage IV carries the same tissue and bone criteria as Stage III with added complexity: five or more teeth lost to the disease, severe mobility, drifting or flaring of the front teeth, and bite collapse where the remaining teeth no longer meet properly.

Meeting properly matters for function, and restoring that function is what Stage IV treatment is built around. Care at this stage combines infection control with rebuilding a workable bite, and it is handled in coordination with a periodontist when specialist procedures are needed. Even here the goal remains the same one it was at Stage I, which is stopping the bone loss where it stands.

How Do I Know What Stage of Gum Disease I Have?

You cannot determine your stage of gum disease at home, because staging depends on attachment loss and bone loss that only a probe and an X-ray can measure. What you can do at home is narrow the range considerably.

Narrowing the range takes a mirror and good light. Bleeding with no recession and no looseness points toward gingivitis or Stage I. Visible recession with teeth that look longer points toward Stage II or beyond. Dark triangles, pus, or any sense of movement points toward Stage III or IV. That self-check tells you how urgently to book, not what your diagnosis is.

How Does a Dentist Diagnose Gum Disease?

A dentist diagnoses gum disease by measuring the depth of the space between each tooth and the gum with a calibrated probe, then reading bone levels on X-rays. Six points are measured around every tooth, which produces a map of where the disease is active rather than a general impression. X-rays add what the probe cannot show, and two early radiographic signs of bone loss are crestal irregularity, a fuzziness at the top of the bone, and a widening of the periodontal ligament space between teeth. A periodontal exam in our Bethesda office covers both, and the numbers get recorded so we can compare them at the next visit.

What Are the Symptoms of Gum Disease?

The symptoms of gum disease are bleeding gums, swelling, color change, bad breath, recession, and eventually loose teeth. Most of them appear gradually, and several are easy to explain away as something else.

• Swollen or puffy gums
• Bright red, dark red, or dark purple gums
• Gums that feel tender when touched
• Gums that bleed easily, or a toothbrush that looks pink afterward
• Bad breath or a bad taste that keeps coming back
• Pus between the teeth and gums
• Gums pulling away from the teeth, making teeth look longer
• New spaces between teeth that look like black triangles
• Loose teeth, or a bite that feels different than it used to
• Pain while chewing

What Are Two Signs That You Have Gum Disease?

The two clearest signs that you have gum disease are gums that bleed when you brush and gums that have pulled back from your teeth. Bleeding is the earliest reliable sign, since healthy gums do not bleed under normal brushing. Recession is the sign that the disease has moved past the reversible stage, because it means attachment has been lost rather than merely irritated.

What Does Gum Disease Feel Like?

Gum disease usually feels like nothing at all in its early stages, which is what makes it dangerous. Later stages produce tenderness along the gumline, sensitivity to cold on exposed roots, soreness that concentrates in one area, discomfort while chewing on a particular side, and a sense that a tooth shifts slightly under pressure. Pain arrives late in this condition rather than early.

Does Gum Disease Cause Bad Breath?

Yes, gum disease causes bad breath. The bacteria multiplying in periodontal pockets release volatile sulfur compounds as they break down proteins, and those compounds produce a distinct odor that mouthwash covers for about an hour before it returns. Persistent bad breath that survives brushing is one of the most reliable early indicators we see.

What Causes Gum Disease?

Gum disease is caused by plaque, a sticky film of bacteria that forms on teeth from the sugars and starches in food. Every stage of this condition traces back to that film and how long it is allowed to sit.

Sitting undisturbed is what changes plaque from a nuisance into a problem. Plaque begins mineralizing into hard calculus, commonly called tartar, within 24 to 72 hours, and tartar bonds to the tooth firmly enough that no toothbrush removes it. Tartar below the gumline holds bacteria against the tissue permanently, and the immune response to that constant presence is what breaks down the attachment and the bone underneath. The classic research by Löe, Theilade, and Jensen, published in the Journal of Periodontology in 1965, showed how fast the first stage arrives: volunteers who stopped cleaning their teeth developed gingivitis within 9 to 21 days, every one of them.

Why Do Gums Bleed When You Brush?

Gums bleed when you brush because inflamed tissue has fragile capillaries sitting close to the surface. Inflamed tissue reacts this way to the bacteria at the gum margin, and the common response of brushing the area less feeds those same bacteria. Bleeding gums that continue past two weeks of careful daily cleaning indicate deposits sitting somewhere a brush cannot reach.

What Are Periodontal Pockets?

Periodontal pockets are the spaces that open between the tooth and the gum once attachment is lost. A healthy gum sits against the tooth with a shallow space of 1 to 3mm. As inflammation destroys attachment, that space deepens, fills with plaque and tartar, and becomes impossible to clean at home. Pocket depth is one of the measurements that determines stage, which is why a dentist reads it at every point around every tooth.

What Increases Your Risk of Gum Disease?

Smoking, diabetes, hormonal changes, genetics, dry mouth, and conditions that weaken immunity all increase your risk of gum disease. Plaque forms in every mouth, so these factors explain why some people progress and others never do.

Smoking leads that list by a wide margin. The CDC reports that smokers carry twice the risk of gum disease compared with nonsmokers, and smoking is the most significant changeable risk factor there is, with the added complication that it reduces how well treatment works. National Institute of Dental and Craniofacial Research data puts prevalence at 62.4 percent among current smokers and 59.9 percent among adults reporting diabetes. Vaping and marijuana use carry risk as well. Hormonal shifts during puberty, pregnancy, and menopause make gum tissue more reactive, and medications that cause dry mouth remove the saliva that normally rinses bacteria away. Keeping up with routine cleanings matters more, not less, when any of these apply to you.

At What Age Do Most People Get Periodontal Disease?

Most people develop periodontal disease after age 30, and prevalence rises steadily with each decade. CDC data published in the Journal of Dental Research shows 47.2 percent of adults aged 30 and over affected, climbing to 70.1 percent of adults 65 and older, and the University of Rochester Medical Center reports that 75 percent of adults over 35 have gingivitis in some form. Age is not the cause here. Years simply give plaque more opportunity, which is why the condition concentrates in older age groups.

How Quickly Does Gum Disease Progress?

Gingivitis develops within two to three weeks of plaque being left undisturbed, while periodontitis progresses over years rather than weeks. The two halves of this condition move on completely different clocks.

Different clocks explain why so many people are surprised at diagnosis. The Löe research recorded gingivitis appearing in 9 to 21 days and resolving within about a week once cleaning resumed. Bone loss, by contrast, accumulates slowly and silently, often across a decade, with the speed depending on smoking, diabetes control, and genetics. Slow progression is also why tooth loss feels sudden when it happens: the loosening only becomes noticeable after roughly half the supporting bone is already gone.

Will Gum Disease Go Away by Itself?

Gum disease will not go away by itself. Gingivitis resolves when daily plaque removal improves, which is a change in behavior rather than the condition clearing on its own. Periodontitis does not resolve at all without treatment, and because it produces little pain, it tends to advance quietly while nothing appears to be happening.

How Long Does It Take for Periodontal Disease to Make Your Teeth Fall Out?

Periodontal disease usually takes years, often a decade or more, to reach the point of tooth loss. Teeth stay stable until roughly half of the supporting bone is gone, so mobility is a late development rather than an early warning. Treatment started at any stage stops that clock, and replacing a tooth becomes the conversation only after the bone supporting it has been lost past the point of stability.

What Can Be Mistaken for Gum Disease?

Brushing abrasion, hormonal gingivitis, medication-related gum overgrowth, mouth breathing, and natural gum pigmentation are all commonly mistaken for gum disease. Each produces a gum line that looks wrong in a way that resembles the real thing.

Resembling the real thing is where self-diagnosis breaks down. Aggressive brushing with a hard-bristled brush wears the gum margin back mechanically, producing recession with none of the infection behind it. Hormonal gingivitis during pregnancy makes tissue red and swollen in a mouth that is otherwise healthy. Certain blood pressure, seizure, and immune medications cause gum tissue to overgrow rather than recede. Mouth breathing dries the front gum tissue and leaves it red and inflamed-looking. Natural pigmentation gives some people dark pink or brown gums that are perfectly healthy. Telling these apart from actual attachment loss takes a probe, which is the whole argument for having it looked at rather than guessed at.

How Is Gum Disease Treated?

Gum disease is treated by removing the bacterial deposits above and below the gumline, then keeping them from rebuilding. What changes from stage to stage is how deep the instruments have to reach and what has to be rebuilt afterward.

1. Examination and measurement. Pockets are probed at six points per tooth and X-rays establish bone levels, which sets the stage and the plan.
2. Professional cleaning. For gingivitis, removing tartar above and just below the gumline plus improved home care resolves the condition.
3. Scaling and root planing. For periodontitis, a deep cleaning clears debris and bacteria from inside the pockets and smooths the root surfaces so tissue can reattach.
4. Antimicrobial therapy. An antimicrobial rinse or a topical antibiotic placed in the pockets helps the infection resolve where it is stubborn.
5. Laser therapy. For deeper cases, laser treatment removes diseased tissue beneath the gumline and seals the pockets for healing.
6. Surgical care. Advanced cases may need pocket reduction, regeneration procedures, or grafting, coordinated with a periodontist.
7. Maintenance. Cleanings on a shortened interval keep the deposits from rebuilding in the same places.

Scaling and root planing carries most of the load in that sequence, and the results are measurable. A meta-analysis by Hung and Douglass in the Journal of Clinical Periodontology found roughly 1mm of pocket reduction in moderate pockets of 4 to 6mm and about 2mm in pockets deeper than 6mm. Our periodontal therapy follows that evidence, pairing the cleaning with antimicrobial support where the infection warrants it.

For advanced or stubborn cases we use the LightWalker laser treatment system for Wavelength-Optimized Periodontal Therapy, which removes bacteria and diseased tissue beneath the gumline with precision, sterilizes and seals the pockets, and helps stimulate regeneration of bone and gum tissue.

What Is Scaling and Root Planing?

Scaling and root planing is a deep cleaning that removes tartar and bacteria from the root surfaces below the gumline. Scaling clears the deposits; root planing smooths the roughened root so the gum tissue can reattach and so new deposits have less to cling to. The procedure is done with the area numbed, often across two visits so each side of the mouth is treated separately. A deep cleaning reaches several millimeters below where any toothbrush can go, which is the entire reason it exists as a procedure.

Can Gum Disease Be Cured?

Gingivitis can be cured and periodontitis can be controlled. Gingivitis resolves completely because no tissue has been destroyed. Periodontitis becomes a chronic condition held stable through treatment and ongoing maintenance, which in practical terms means comfortable, functional gums and teeth you keep.

How Is Gum Disease Treated at Each Stage?

Gum disease is treated non-surgically at Stages I and II, with a combination of non-surgical and surgical care at Stages III and IV. Gingivitis needs a cleaning and better daily habits. Stages I and II typically need scaling and root planing followed by a re-evaluation to confirm the pockets responded. Stages III and IV often add laser therapy, surgical procedures, and rehabilitation of the bite, usually with a periodontist involved.

How Do You Keep Gum Disease From Coming Back?

You keep gum disease from coming back with daily plaque removal and professional cleanings on a schedule set by your dentist. Periodontitis is managed rather than cured, so maintenance is the treatment rather than an afterthought to it.

Maintenance intervals shorten after a diagnosis. Where most patients do well on six-month visits, patients with a periodontal history are often seen every three to four months, because deposits rebuild faster in mouths that have had the disease before. A professional cleaning on that shortened schedule is what keeps pockets from deepening again between visits.

Home care carries the rest, and so does controlling the risk factors underneath. Quitting tobacco, managing blood sugar, and treating dry mouth all reduce the chance of relapse substantially. Keeping gums healthy after treatment depends more on those daily choices than on anything that happens in the chair.

How Do You Brush Your Teeth With Periodontal Disease?

Brush with a soft-bristled brush held at a 45-degree angle toward the gumline, using short circular motions for two full minutes twice a day. The angle matters because the bristle tips need to reach just under the gum margin where the bacteria live. Pressure does not help and does damage, so rest the brush against the tooth rather than scrubbing. Clean between every tooth once a day as well, since that is where the disease starts and where a brush has never reached.

How Often Should You See a Dentist With Gum Disease?

Patients with gum disease should see a dentist every three to four months rather than every six. The shortened interval exists because tartar re-forms fastest in the pockets that were treated, and catching that rebuild early keeps the disease from regaining ground. Your dentist sets the exact interval based on how your pockets responded to treatment.

How Does Gum Disease Affect the Rest of Your Body?

Gum disease affects the rest of your body because bacteria from inflamed gum tissue enter the bloodstream and travel elsewhere. Inflamed gum tissue is an open wound, and a mouth with widespread periodontitis can present a surprisingly large area of it.

That open surface is the mechanism behind the associations researchers keep finding. The Mayo Clinic links periodontitis with respiratory disease, rheumatoid arthritis, coronary artery disease, preterm birth and low birth weight, and difficulty controlling blood sugar in diabetes. Ongoing inflammation also puts a sustained load on the immune system, which contributes on its own.

Is Gum Disease Linked to Heart Disease?

Yes, gum disease is linked to heart disease. The Mayo Clinic lists coronary artery disease among the conditions associated with periodontitis, and the proposed connection runs through bacteria entering the bloodstream through gum tissue along with the systemic inflammation that accompanies chronic infection. The relationship is an association rather than a proven cause, and it is consistent enough across studies that treating gum disease is worth doing for reasons beyond your teeth.

What Organs Do Bad Teeth Affect?

Untreated oral infection has been associated with effects on the heart, the lungs, the pancreas through blood sugar regulation, and the joints. The route is the same in each case: bacteria and inflammatory byproducts entering circulation through diseased gum tissue. Keeping the mouth healthy removes that entry point.

Frequently Asked Questions

What Is the Difference Between Gingivitis and Periodontitis?

The difference between gingivitis and periodontitis is bone loss. Gingivitis inflames the gum tissue with no damage to the attachment or the bone, and it reverses fully with daily plaque removal. Periodontitis destroys the attachment and the bone holding the teeth, and that destruction is permanent even when the infection itself is brought under control.

How Long Can You Keep Your Teeth With Periodontal Disease?

You can keep your teeth for life with periodontal disease when it is diagnosed and managed. The CDC states that periodontitis can be managed and slowed with professional treatment. The outcome depends far more on how early treatment begins and how consistently maintenance continues than on the diagnosis itself.

Can Gum Disease Come Back After Treatment?

Gum disease can come back after treatment, and relapse is the reason maintenance visits exist. The same bacteria recolonize the same pockets, faster in patients who smoke, have uncontrolled diabetes, or slip on daily cleaning. Patients who hold their routine and keep their shortened cleaning interval stay stable for decades.

Will Periodontal Disease Go Away When Teeth Are Removed?

Periodontal disease resolves in a site where the tooth is removed, because the pocket around that tooth no longer exists. It does not protect the remaining teeth, since the bacteria responsible are still present throughout the mouth. Removing a tooth treats one site rather than the condition, which is why saving teeth with treatment is the first approach every time.

What Autoimmune Disease Is Linked to Gum Disease?

Rheumatoid arthritis is the autoimmune condition most consistently linked to gum disease. The Mayo Clinic lists it among the conditions associated with periodontitis, and researchers point to shared inflammatory pathways as the likely connection. Rheumatoid arthritis also appears on the list of conditions that raise the risk of developing periodontitis, so the relationship appears to run in both directions.

Can Gum Disease Cause Tooth Loss?

Yes, gum disease causes tooth loss, and it is the leading cause of tooth loss in adults. Teeth are held by bone rather than by gum tissue, so loss happens once enough supporting bone has been destroyed for the tooth to lose stability. Treatment stops the bone loss where it stands, and bone that remains keeps holding teeth indefinitely.

The Bottom Line

Gum disease shows itself before it hurts. Red, puffy gums that bleed when you brush are the early picture, and the later picture is recession, dark triangles between the teeth, pus at the margin, and movement. Between those two pictures sits a staging system built on millimeters of attachment loss and percentages of bone loss, which is why an exam tells you something a mirror cannot. Gingivitis reverses completely. Every stage after it can be stopped where it stands, and stopping it early is the difference between a cleaning and a rebuild.

If your gums have been bleeding, or a tooth has started to look longer than it used to, an exam gives you a clear answer rather than a guess. Dr. Hornstein and our team at Dentistry of Bethesda measure, explain what the numbers mean, and lay out what treatment would involve for your particular stage. Call us at (301) 530-2700 or schedule a visit whenever you are ready.