Localized gum swelling around a single tooth is usually caused by a trapped food particle (foreign body impaction), an acute periodontal abscess (gum boil), a periapical root infection (fistula), or an impacted wisdom tooth. Treatment requires professional dental flushing, pus drainage, or root canal therapy.
Trapped Food / Seed
Deep Gum Pocket
Dying Tooth Nerve
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1. 4 Common Reasons Why Gums Swell Around One Tooth
- Food Impaction: A sharp food particle—such as a mango fibre, cumin seed (jeera), popcorn kernel, or toothpick splinter—gets wedged below the gum margin, creating an acute inflammatory bump within 24 hours.
- Periodontal Abscess: Bacteria become trapped inside a deep periodontal gum pocket, forming an acute pus-filled swelling that feels tender and throbs.
- Periapical Fistula (Gum Boil / Parulis): When a tooth nerve dies from deep decay, infection exits the root tip and bores a tiny drainage tunnel through the bone into the gum. A small pimple-like bump appears on the gum that periodically pops and tastes salty.
- Pericoronitis (Wisdom Tooth Flap): The gum flap over a partially erupted wisdom tooth becomes swollen, bruised, and infected from chewing pressure from the opposing tooth.
2. What Should You Do Immediately?
- Rinse with warm salt water 4 to 5 times daily to reduce swelling and promote gentle drainage.
- Gently use dental floss around the tooth to dislodge any trapped food particles. Do NOT use safety pins or wooden toothpicks, which push debris deeper and lacerate gum tissue.
- Visit a dental clinic for an intraoral X-ray to determine whether the problem originates in the gum pocket or the tooth root.
3. Professional Treatments in India
If caused by a foreign object, the dentist will perform painless subgingival irrigation and curettage (₹500–₹1,200). If caused by a root abscess, opening the tooth for a root canal immediately relieves pressure and drains the infection.
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Frequently Asked Questions (FAQs)
Can I pop the gum boil at home with a needle?
Never pop a gum boil yourself! Puncturing the gum introduces new mouth bacteria, causes severe infection, and fails to treat the underlying tooth root cause.
Will swollen gums heal on their own?
If caused by minor superficial food irritation that is flushed out, it may resolve in 48 hours. If pus or infection is present, it will never heal permanently without professional dental intervention.