Periodontitis: Symptoms, Stages, and Treatment

Part of the Gum Health guide in the Oral Health section.

What is periodontitis?

Periodontitis is a chronic inflammatory disease affecting the gums, connective tissues, and bone that hold teeth in place. It usually begins when plaque—a sticky film containing bacteria—collects around the gumline. Plaque that is not removed can harden into tartar, also called calculus. Tartar cannot be brushed away at home.

As inflammation continues, the gum can detach from the tooth and form an abnormally deep space called a periodontal pocket. Bacteria can persist below the gumline, while the body’s inflammatory response contributes to the loss of supporting tissue and bone. Teeth may eventually shift, loosen, or need removal.

Periodontitis is not the same as ordinary, short-lived gum irritation. It requires a professional diagnosis. It is also different from gingivitis, the earlier form of plaque-related gum disease.

Symptoms and warning signs

Periodontitis can become established before it causes obvious pain. Do not use the absence of pain as proof that your gums are healthy. Possible signs include:

• red, swollen, or tender gums;
• gums that bleed during brushing, interdental cleaning, or eating;
• persistent bad breath or an unpleasant taste;
• gums pulling away from teeth, making the teeth look longer;
• new spaces appearing between teeth;
• pus between a tooth and the gum;
• tooth sensitivity or pain when chewing;
• teeth that feel loose, shift position, or no longer meet in the same way;
• a partial denture that fits differently; or
• a recurring swollen spot or “gum boil.”

For a broader overview of patterns and causes, see what bleeding gums can mean. Bleeding limited to one small area can have several causes, including plaque, trapped food, local injury, gingivitis, periodontitis, or an abscess. A symptom pattern cannot confirm the cause without an examination.

What causes periodontitis?

The most common pathway starts with plaque left along and between the teeth. The gum becomes inflamed, and untreated gingivitis can progress in a susceptible person. As a periodontal pocket deepens, it becomes harder to clean at home. Tartar and bacterial deposits below the gumline sustain inflammation, and supporting tissues may break down over time.

This does not mean everyone with gingivitis will develop severe periodontitis. The speed and severity vary because oral hygiene, tobacco exposure, health conditions, genetics, access to care, and the body’s inflammatory response all matter.

Factors that can raise risk or worsen progression

• Smoking and other tobacco use: Tobacco is one of the strongest modifiable risk factors. It can also hide bleeding, delay healing, and make treatment less successful.
• Diabetes: Periodontitis is more common and can be more severe in people with diabetes, particularly when blood glucose is not well controlled. Gum treatment should complement—not replace—medical diabetes care.
• Inconsistent plaque removal: Plaque left at and below the gumline drives inflammation. Crowding or restorations that are difficult to clean can make daily plaque control harder.
• Age and lifetime exposure: Risk increases with age, but periodontitis is not an unavoidable part of getting older.
• Genetic susceptibility: Some people develop more severe disease despite similar plaque exposure.
• Medicines and health conditions: Some medicines affect saliva or gum tissue. Conditions or treatments that alter immunity can also affect risk and healing. Tell the dental team about all medicines and diagnoses.
• Hormonal changes: Pregnancy and menopause can change how gum tissue responds to plaque. These changes make careful prevention and professional monitoring more important; they do not make tooth loss inevitable.
• Stress, nutrition, obesity, and other systemic factors: These have been associated with periodontal disease, but no single factor replaces the central roles of plaque control and professional care.

How dentists diagnose periodontitis

A diagnosis usually combines several findings rather than relying on gum color or one symptom. The dental professional may:

1. Review your history. Expect questions about bleeding, pain, tobacco, diabetes, pregnancy, medicines, prior gum treatment, and changes in your bite.
2. Examine the gums and teeth. The clinician checks plaque, tartar, inflammation, recession, pus, tooth mobility, and how the teeth meet.
3. Measure periodontal pockets. A small calibrated probe measures the spaces between teeth and gums and checks for bleeding. The National Institute of Dental and Craniofacial Research notes that healthy pockets are generally 1 to 3 millimeters; deeper readings can indicate disease, but the complete pattern matters.
4. Take dental X-rays when indicated. X-rays help show the amount and pattern of bone loss and may identify other dental problems.
5. Assess severity and progression risk. Dentists and periodontists may describe periodontitis by a stage, reflecting severity and treatment complexity, and a grade, reflecting likely progression and risk factors.

A general dentist can identify and treat many cases. A periodontist—a dentist with advanced training in gum disease—may be involved when disease is advanced, progressing quickly, difficult to stabilize, or likely to require surgery.

How periodontitis is treated

The goals are to reduce infection and inflammation, make the teeth easier to keep clean, prevent further attachment and bone loss, and preserve comfortable function. Treatment depends on the affected sites, severity, medical history, and response to earlier care.

1. Improve daily plaque control and address risk factors

The dental team will show you how to clean the gumline and between the teeth without injuring the tissue. They may recommend floss, correctly sized interdental brushes, or another device based on the spaces in your mouth. Tobacco cessation and appropriate diabetes management can materially improve the treatment plan and healing.

2. Remove deposits above and below the gumline

Scaling and root planing—often called deep cleaning—removes plaque and tartar from the tooth and root surfaces below the gumline. It may be completed in sections, sometimes with local anesthetic. Root surfaces are cleaned so that the gum can heal more closely around them.

Temporary tenderness, bleeding, or sensitivity can occur after treatment. As inflamed tissue heals and swelling falls, the gums may look more receded and spaces may seem larger. This does not necessarily mean the treatment caused the underlying tissue loss; previously swollen tissue can mask it.

3. Reassess healing

After an appropriate healing period, the clinician rechecks plaque levels, bleeding, pocket depths, and any sites that continue to lose support. Good response may mean moving to periodontal maintenance. Persistent deep pockets or difficult anatomy may require additional care.

4. Consider targeted medicines or surgery when appropriate

A dentist may use a prescribed antimicrobial rinse or medicine in selected circumstances. Antibiotics are not a substitute for removing deposits and treating the source, and they are not routinely necessary for every case.

When non-surgical treatment does not achieve adequate control, a periodontist may discuss surgery to gain access for deeper cleaning, reshape tissues, or attempt regenerative treatment at selected defects. No procedure can guarantee complete regrowth of lost bone or gum attachment. The likely benefit, limits, cost, healing time, and alternatives should be explained for the individual site.

5. Continue periodontal maintenance

Periodontitis has a tendency to recur. Maintenance visits allow the dental team to remove deposits, recheck pocket depths and bleeding, and respond early to new disease. The interval is individualized; people with a history of periodontitis may need care more often than a routine schedule intended for low-risk patients.

What you can do at home—and what home care cannot do

Daily care is essential both during and after professional treatment:

• brush twice daily with fluoride toothpaste and a soft-bristled brush;
• clean between teeth every day using the method and sizes recommended for your mouth;
• clean gently along the gumline rather than scrubbing harder;
• stop smoking or using tobacco and ask for cessation support if needed;
• follow your periodontal maintenance schedule;
• manage diabetes and other health conditions with the appropriate medical team; and
• report new bleeding, swelling, pus, tooth movement, or bite changes promptly.

Home care cannot remove tartar below the gumline, measure bone loss, drain an abscess, stabilize a loose tooth, or rebuild lost support. Mouthwash may be a useful adjunct when a dentist recommends it, but it does not replace brushing, interdental cleaning, scaling, or follow-up. Avoid unproven “gum regrowth” products and do not apply aspirin, peroxide, essential oils, or other concentrated substances directly to sore tissue.

For an overview of daily prevention and common gum problems, return to the practical Gum Health guide. If the gumline is pulling away from one or more teeth, see causes and treatment options for receding gums.

Can periodontitis be prevented?

Many cases can be prevented or found before extensive damage occurs. Practical measures include:

• removing plaque twice daily and between the teeth every day;
• having dental examinations and professional cleaning at a schedule based on personal risk;
• treating persistent gingivitis rather than waiting for pain;
• avoiding tobacco;
• seeking care for dry mouth, poorly fitting restorations, or areas that are consistently difficult to clean; and
• telling both dental and medical professionals about diabetes, pregnancy, immune conditions, and medicine changes.

Prevention continues after treatment. Stable gums today do not erase a history of periodontitis, so long-term monitoring remains important.

When to seek urgent help

Arrange an urgent dental assessment if you develop a painful swelling, pus, a bad taste with a swollen gum, a suddenly loose tooth, marked pain when biting, or fever with dental symptoms. These can suggest a gum abscess or spreading dental infection.

Seek emergency medical care now if swelling is rapidly increasing or you have difficulty breathing, swallowing, or speaking; swelling near an eye or a new vision problem; extensive swelling in the mouth, face, or neck; or severe difficulty opening your mouth. Do not wait for a routine dental appointment when the airway, eye, or spreading infection may be involved.

Frequently asked questions

Is periodontitis curable?

Existing attachment and bone loss are generally not reversible through routine home care, so periodontitis is better described as controllable than “cured.” Professional treatment, effective plaque removal, risk-factor control, and maintenance can often slow or stop further progression.

Can gums and bone grow back after periodontitis?

They do not reliably grow back on their own. Selected periodontal procedures may regenerate some support in suitable defects, but results depend on the site and cannot be guaranteed. A periodontist can explain whether a regenerative approach is reasonable.

Does periodontitis always hurt?

No. It can progress quietly. Bleeding, recession, bad breath, deep pockets, or bone loss may be present without significant pain, which is why examinations matter.

Can periodontitis affect only one tooth?

Yes. Disease can be localized to one area or generalized across many teeth. A local deep pocket can also have another cause, such as a cracked tooth or food impaction, so it needs assessment.

Will mouthwash treat periodontitis?

No over-the-counter rinse can remove subgingival tartar or restore lost support. A dentist may prescribe a rinse or other antimicrobial as an adjunct in selected cases, but mechanical cleaning and professional treatment remain central.

How long does treatment take?

It varies with severity, the number of sites involved, the treatment used, healing, and whether surgery is needed. Active treatment is followed by lifelong maintenance rather than a single permanent fix.

Should I see a dentist or a periodontist?

Start with a dentist unless you already have a periodontist or were told to return to one. The dentist can perform an initial assessment and refer complex, advanced, or poorly responding disease.

Sources

• National Institute of Dental and Craniofacial Research: Periodontal (Gum) Disease
• Centers for Disease Control and Prevention: About Periodontal (Gum) Disease
• American Academy of Periodontology: Gum Disease Information
• American Academy of Periodontology: Non-Surgical Treatments
• NHS: Gum disease

Medical disclaimer

This article provides general educational information and cannot diagnose gum disease or recommend treatment for an individual. Symptoms that look similar may have different causes. A dentist or periodontist must examine your mouth to diagnose periodontitis and plan care. For breathing or swallowing difficulty, rapidly spreading facial or neck swelling, eye involvement, or another possible emergency, contact your local emergency service immediately.