Written by Calvin Bennet · Medically reviewed by Dr. Scott A. Puckett, DDS · Updated August 2026
Gum disease (periodontal disease) is a bacterial infection of the tissues that hold your teeth in place. Its early stage, gingivitis, is common and reversible; left untreated it can progress to periodontitis and become a leading cause of tooth loss in adults. The good news: it’s largely preventable, and the earlier it’s caught, the easier it is to reverse. This guide covers the causes, warning signs, stages, treatment, and prevention — medically reviewed by Dr. Scott A. Puckett, DDS, a board-certified oral & maxillofacial surgeon.
What is Gum Disease?
Gum disease is an infection of the gums and the bone that support your teeth. It’s caused by plaque — the sticky film of bacteria that constantly forms on teeth. When plaque isn’t removed by brushing and flossing, it hardens into tartar and the bacteria irritate and infect the gums. It’s often painless in the early stages, which is why many people don’t realize they have it until it’s advanced.
Gum disease is extremely common: the CDC estimates that roughly 47% of adults aged 30 and older have some form of periodontitis, and the share rises with age.
The Stages of Gum Disease
Gum disease progresses in stages. Catching it early is everything:
| Stage | What’s happening | Reversible? |
|---|---|---|
| Gingivitis | Inflammation of the gums from plaque at the gumline. Gums are red, swollen, may bleed when brushing. | Yes — with good hygiene + a professional cleaning |
| Early–moderate periodontitis | Gums begin to pull away from teeth, forming “pockets” that trap bacteria; some bone loss begins. | Manageable, not fully reversible — needs professional treatment |
| Advanced periodontitis | Deep pockets, significant bone loss; teeth may loosen or shift. | Requires intensive treatment; teeth may be lost |
Symptoms: signs of gum disease to watch for
See a dentist if you notice:
- Red, swollen, or tender gums
- Gums that bleed when you brush or floss
- Gums pulling away from the teeth (teeth look “longer”)
- Persistent bad breath or a bad taste
- Loose or shifting teeth
- A change in how your teeth fit together when you bite
- Pus between the teeth and gums
Because early gum disease is usually painless, absence of pain is not a sign you’re fine. Bleeding gums are the most common early warning.
What causes gum disease? Causes and risk factors
Plaque is the direct cause, but several factors raise your risk:
- Poor oral hygiene (inconsistent brushing/flossing)
- Smoking or tobacco use — one of the most significant risk factors
- Diabetes (and gum disease can, in turn, make blood sugar harder to control)
- Genetics / family history
- Hormonal changes (pregnancy, menopause) that make gums more sensitive
- Certain medications that reduce saliva or cause gum overgrowth
- Stress, poor nutrition, and some illnesses that affect the immune system
How gum disease is diagnosed
A dentist or hygienist checks your gums and uses a small probe to measure the depth of the pockets around your teeth (healthy is roughly 1–3 mm; deeper suggests disease), and may take X-rays to check for bone loss. This is part of a routine dental exam — another reason regular checkups matter.
How to prevent gum disease
Prevention is mostly the fundamentals, done consistently:
- Brush twice a day for two minutes with fluoride toothpaste and a soft-bristled brush.
- Clean between your teeth daily with floss or interdental brushes — a toothbrush can’t reach where gum disease often starts.
- See your dentist for regular checkups and professional cleanings — tartar can only be removed professionally.
- Don’t smoke, and manage risk factors like diabetes.
- Eat a balanced diet and limit sugary snacks and drinks.
How is gum disease treated?
Treatment depends on the stage:
- Gingivitis: improved home care plus a professional cleaning usually reverses it.
- Periodontitis: a deep cleaning called scaling and root planing removes plaque and tartar from below the gumline and smooths the roots so gums can reattach. Your dentist may also use antibiotics.
- Advanced disease: may require periodontal (gum) surgery, bone or tissue grafts, and ongoing maintenance with a dentist or periodontist.
The link between gum disease and overall health
Research has found associations between gum disease and other health conditions, including heart disease, diabetes, and complications in pregnancy. Gum disease is linked to (not proven to directly cause) these conditions, and managing your gum health is considered part of taking care of your overall health.
- Heart disease — the chronic inflammation of gum disease may play a role in cardiovascular problems (Harvard Health).
- Diabetes — the link runs both ways: diabetes raises your risk of gum disease, and gum disease can make blood sugar harder to control (American Diabetes Association).
- Respiratory infections — bacteria from the mouth can be inhaled into the lungs, potentially contributing to infections such as pneumonia.
- Pregnancy — gum inflammation is very common while expecting and has been linked to complications (see bleeding gums during pregnancy).
When to see a dentist
Book a visit if your gums bleed regularly, look red or swollen, are receding, or if you have persistent bad breath or loose teeth. Early gum disease is reversible — the sooner it’s caught, the simpler the fix.
Conclusion
Gum disease is common, often silent, and largely preventable. Consistent brushing and flossing, regular professional cleanings, and not smoking are your best protection — and if you already notice the signs, early treatment can stop it in its tracks and often reverse it.
Sources:
- Centers for Disease Control and Prevention (CDC) — Periodontal disease
- CDC — Gum Disease Fast Facts
- American Dental Association (ADA) / MouthHealthy — Gum disease
- National Institute of Dental and Craniofacial Research (NIDCR) — Periodontal (gum) disease
- American Academy of Periodontology (AAP)
Medical disclaimer: this article is for general education and is not a substitute for professional dental advice, diagnosis, or treatment. See your dentist about your specific situation.
Gingivitis, the earliest stage, can usually be reversed with good oral hygiene and a professional cleaning. Later-stage periodontitis can be managed and stopped but not fully reversed, which is why early treatment matters.
Often not — early gum disease is usually painless, so bleeding or swollen gums are the signs to watch for rather than pain.
Common early signs are red, swollen gums and bleeding when you brush or floss. A dentist confirms it by measuring the pockets around your teeth during an exam.
Untreated, advanced periodontitis is a leading cause of tooth loss in adults because it destroys the bone and tissue that hold teeth in place. Early treatment greatly reduces that risk.