A bump on the lip can have many causes, ranging from harmless to those requiring medical attention. Common causes include:
- Fordyce spots: small, painless, yellowish or white bumps caused by sebaceous (oil) glands on the lips. These are benign and common.
- Mucoceles: cysts that form when salivary glands become blocked, often due to lip-biting or irritation. These are usually painless.
- Allergic reactions: bumps can appear from allergies to food, lip products, or environmental factors, sometimes accompanied by itching or swelling.
- Acne or pimples: clogged pores on the lips causing small bumps.
- Cold sores (herpes simplex virus): fluid-filled blisters that start as bumps and can be painful and contagious.
- Canker sores: small ulcers that develop on lips or inside the mouth, sometimes initially appearing as bumps.
- Injuries or trauma: biting or irritation can cause temporary bumps.
- Oral cancer: rare but serious cause if the bump persists for more than two weeks or changes in size, color, or shape.
- Milia: tiny white bumps from trapped dead skin cells.
- Infections: bacterial or fungal infections can cause bumps.
If the bump lasts more than two weeks, changes, bleeds, or is painful, it is important to see a healthcare provider for diagnosis and appropriate treatment.
