Gum Inflammation: Causes, Signs and Symptoms Explained

What is gum inflammation and what does it look like?

Gum inflammation is your body’s response to plaque bacteria sitting at the gumline, and it’s very common and manageable. Plaque is the sticky film of bacteria that forms on everyone’s teeth.

The usual signs are red or dark red gums, puffiness, shiny tissue, bleeding when you brush or floss, and bad breath. Clinical descriptions list these same signs for gingivitis (the early, reversible stage of gum disease).

Healthy gums versus inflamed gums

Healthy gums are pale pink, firm and snug around each tooth, and they don’t bleed easily. Dental descriptions say healthy gums fit tightly with thin, knife-like edges. Inflamed gums look redder, rounder and smoother. For more on the healthy side, see what healthy gums look like.

What inflamed gums feel like day to day

Inflamed gums often feel tender, sore, itchy, warm or tight, and sometimes mildly throbbing. Early gingivitis is often painless, so bleeding may be the only clue. Pain that grows or beats strongly points to something else, covered below.

What causes gum inflammation?

The most common cause of gum inflammation is plaque and tartar building up at the gumline. A classic review concluded that gingivitis comes from plaque, and other factors mostly make plaque stick around or make gums react more.

Plaque, tartar and gingivitis

Plaque forms on everyone’s teeth, so this isn’t about being careless. Tartar is plaque that has hardened. You can’t brush it off, so a dentist has to remove it.

Hormonal changes

Hormone shifts can make gums react more strongly to plaque. A 2025 review links puberty, the menstrual cycle, pregnancy and menopause to gum changes. A pregnancy review points to rising estrogen and progesterone as the likely drivers.

Braces, dentures and other irritation

Braces, poorly fitting dentures, rough fillings and trapped food can all irritate gums. Cleveland Clinic notes that plaque around brackets and ill-fitting dentures can cause swelling.

Smoking, medicines and health conditions

Smoking, some medicines and diabetes can raise your risk. A clinical review lists them among gingivitis risk factors. Gum disease has also been linked with rheumatoid arthritis and heart disease. So tell your dentist about your health.

Nutrition and stress

Low vitamin C and calcium intake can play a part, and so can stress. The same clinical review lists low vitamin C among the risk factors.

Why is my gum inflamed in one spot or at the back of my mouth?

A gum inflamed in one spot usually has a local trigger, such as trapped food, a rough edge or a tight gap between teeth.

Behind the front teeth

Gums behind the front teeth are easy to miss with a brush, so plaque collects there. Angle the brush tip and use small, gentle circles.

Back of the mouth and wisdom teeth

Swelling at the back often comes from hard-to-reach plaque or a wisdom tooth that is only partly through the gum. Food and bacteria get stuck under the flap of gum.

Flossing and brushing irritation

Bright red gums after you start flossing often settle within a week or two as gums adjust. Go gently, and curve the floss around each tooth rather than snapping it down.

Quick tip: If one spot is swollen, don’t poke it with a toothpick. Rinse, floss gently, and book a dentist visit if it stays.

Is it gingivitis, or something else? A comparison of causes

Gingivitis is usually widespread, painless and bleeds easily, while other causes tend to be more local or more painful. Use this table as a guide, not a diagnosis.

Periodontitis is the more advanced stage. It can cause lasting damage to the bone that supports your teeth.

How do you get rid of inflamed gums at home?

You calm inflamed gums by removing plaque gently and consistently. Home care often does the job for mild cases.

Should you brush an inflamed gum?

Yes, keep brushing an inflamed gum twice a day with a soft brush. Use gentle small circles at the gumline. Skipping the area lets plaque build up and keeps the swelling going.

Rinses and cleaning between teeth

Clean between your teeth daily with floss or interdental brushes (tiny brushes for the gaps). A warm salt-water rinse may soothe, and Cleveland Clinic suggests an ice pack on the outside of the face for soreness. Mouthwash is optional. A Cochrane review found chlorhexidine rinse (a prescription-strength antiseptic) lowered gingivitis a little but also increased tooth staining, so it’s a short-term add-on, not a fix.

Can an inflamed gum heal on its own?

Often, yes. Cleveland Clinic says swollen gums can improve with routine cleanings and twice-daily brushing and flossing. Gingivitis is reversible with good oral hygiene.

How long does it take?

Mild gingivitis often eases in about one to two weeks once plaque is removed, and bleeding usually settles first. If it doesn’t, a dental cleaning is the next step. Harder tartar may need scaling, and deeper cases may need scaling and root planing, a deeper clean below the gumline.

When should you see a dentist about inflamed gums?

See a dentist if inflamed gums last more than two weeks, and get urgent care for swelling with fever or pus. Cleveland Clinic advises contacting a dentist when swelling lasts over two weeks or gets worse.

See a dentist within a few days

• Symptoms last longer than two weeks despite good cleaning
• Gums bleed often
• Gums are pulling back from teeth
• Teeth feel loose
• Bad breath won’t go away
• You see a bump on the gum

Untreated gingivitis can progress to periodontitis, which needs professional treatment and sometimes antibiotics.

Seek urgent care

• Facial swelling
• Fever
• Pus
• Severe throbbing pain
• Trouble swallowing or opening your mouth

Tell your dentist about pregnancy, diabetes, medicines and smoking.

How can you help keep gums calm long term?

Regular cleanings and steady daily habits keep gums calm over time. Small flare-ups are normal and manageable.

• See your dentist for check-ups and tartar removal as often as they advise.
• Brush twice a day with a soft brush and fluoride toothpaste.
• Clean between teeth daily.
• Eat a balanced diet with vitamin C and calcium.
• If you smoke, stopping helps your gums.

If gums bleed, why gums bleed goes deeper.

Where does this fit with probiotics and gum health?

Gum inflammation starts with plaque, so cleaning comes first. Some people also wonder about mouth-friendly bacteria. Our guide to probiotics for gum health explains what research does and doesn’t show, and oral probiotics covers the basics. They don’t replace brushing, cleaning between teeth or a dentist.