A blister on your gum forms when fluid collects between layers of damaged or inflamed tissue. These lesions typically result from mechanical irritation, infections, or autoimmune reactions.
Most gum blisters appear due to localized trauma or systemic conditions. The body responds by sealing off the irritated area with fluid, creating a protective barrier. This process resembles how skin forms blisters after a burn or friction.
| Type | Common Causes | Appearance |
|---|---|---|
| Traumatic blister | Chewing sharp foods, aggressive brushing, dental work | Clear, fluid-filled bump on gum surface |
| Canker sore (aphthous ulcer) | Stress, minor injuries, acidic foods | White or yellow center with red border |
| Mucous cyst | Salivary gland blockage | Translucent, dome-shaped bump |
See a dentist if a gum blister persists beyond two weeks, grows larger than 1 cm, or causes severe pain. Persistent lesions may indicate oral cancer or autoimmune diseases like lichen planus. In my practice, I've seen patients delay treatment until blisters became painful ulcers-early intervention prevents complications.
Most gum blisters resolve within 7-10 days with proper oral hygiene and avoiding irritants. For persistent cases, dentists may prescribe topical steroids or antibiotics depending on the underlying cause.