Swollen Gums: When to Worry

Mild swelling — usually fine

Causes:

• Early gingivitis from plaque buildup
• Minor food impaction between teeth
• Recent hygiene visit (mild irritation for 24–48 hours)
• Pregnancy hormones (very common)
• Start of a new toothbrush or technique

Self-care for 3–5 days:

• Gentle brushing with soft brush
• Daily flossing (expect light bleeding at first)
• Salt-water rinses 3× daily
• Soft, cool foods

If no improvement by 5 days, see your dentist.

Moderate swelling — see a dentist

Causes:

• Periodontal abscess (infection in a gum pocket)
• Pericoronitis (infected gum flap over a wisdom tooth)
• Deep decay causing pulp inflammation
• Impacted food particle lodged deep
• Ill-fitting restoration causing chronic irritation

Action: dental appointment within 24–48 hours.

Severe swelling — urgent

Signs:

• Swelling visible on the face (not just inside the mouth)
• Fever above 38°C
• Spreading swelling toward the eye or neck
• Difficulty swallowing or breathing
• Severe pain

Action: go to emergency department immediately. These can indicate spreading cellulitis (Ludwig's angina), which is life-threatening.

Specific types

Periodontal abscess

A painful swelling along the gum line, often with pus visible. Causes: blocked gum pocket in periodontitis. Treatment: drainage + deep cleaning + antibiotics.

Periapical abscess

Swelling from an infection at the root tip of a non-vital tooth. Often tender to biting. Treatment: root canal or extraction + possibly antibiotics.

Pericoronitis

Swelling of the gum flap over a partly erupted wisdom tooth. Common in young adults. Treatment: clean under the flap, antibiotics if spreading; wisdom tooth often removed later.

Gingival enlargement (medication-induced)

Certain blood pressure medications, anti-seizure drugs, and immunosuppressants cause overgrowth of gum tissue. Treatment: improved hygiene, possible medication change, occasionally surgical reshaping.

Hormonal gingivitis

Pregnancy (especially 2nd trimester) and puberty can exaggerate any existing gingival inflammation. Treatment: more frequent hygiene visits, gentle home care.

The hygiene response

For early-stage swelling without infection:

• Brush gently, 2 minutes twice daily
• Floss or interdental brush every day (bleeding for 1–2 weeks is expected as gums heal)
• Salt-water rinse 3–4× daily
• Avoid smoking
• No hard or crunchy foods for a few days

Most mild swelling resolves within 7–10 days with consistent care.

Antibiotics — when

Antibiotics are prescribed for:

• Spreading infection
• Systemic signs (fever)
• Immunocompromised patients with infection
• Some pre-surgical prophylaxis cases

Antibiotics are NOT appropriate for:

• Routine gingivitis
• Mild localised inflammation
• Prevention in healthy adults without specific indication

Overuse of antibiotics contributes to resistance; always follow your dentist's prescription precisely.

References

• American Academy of Periodontology
• NHS — Gum infection guidance