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Published on: 8/20/2026

What might a pea-sized lump in my lip indicate?

A pea-sized lump on your lip is often a benign (non-cancerous) growth called a mucocele — a harmless, fluid-filled cyst caused by a blocked or damaged salivary gland. Other possible causes include cold sores, fibromas, or swollen glands. Most lip lumps are not serious, but you should see a doctor if the bump grows, changes color, bleeds, becomes painful, or lasts more than two weeks, as these can be signs of infection or, rarely, something more serious.

Because lip lumps can have many causes — and the right next step depends on your specific symptoms — the fastest way to get clarity is to take a free, instant, online symptom check. In just a few minutes, you'll get personalized insights into what may be causing your lump and clear guidance on whether to monitor at home or see a professional.

Reviewed for medical accuracy: 07/15/2026

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Explanation

A small lump on the lip can have different causes, and possible explanations include:

  • Mucocele – This is a fluid-filled cyst that develops when a salivary gland becomes blocked or damaged. It's one of the most common causes of lip lumps and appears as a soft, painless swelling.
  • Fibroma – A non-cancerous growth made up of fibrous or connective tissue that can develop due to chronic irritation or trauma to the lip.
  • Lipoma – A soft, fatty lump that grows slowly and is typically harmless. While less common on the lips, they can occur in this area.
  • Angioleiomyoma – This is a painless growth made up of muscle cells that form around blood vessels. It is a rare, benign tumor that has been seen on the upper lip.
  • Basal Cell Adenoma – This is a non-cancerous tumor that arises from the salivary gland tissue found in the lips. Although it is generally rare, it can appear as a small, slowly growing nodule.
  • Senile Hemangioma – Usually seen in older adults, this is a collection of blood vessels that may appear as a red or purple area on the lip.

Each of these conditions is typically not harmful. However, some sexually transmitted diseases may present as lumps on the lip. If you notice the lump grows, changes color or shape, or causes discomfort, you can use Ubie's free AI symptom checker to help evaluate your symptoms and determine whether you should seek care from a healthcare professional.

(References)

  • Hassona Y, Sawair F, Scully C. Angioleiomyoma of the upper lip. BMJ Case Rep. 2017 May 12;2017:bcr2016219172. doi: 10.1136/bcr-2016-219172. PMID: 28500121; PMCID: PMC5612575.

  • Ahmad SA, Popli DB, Sircar K, Hasan S. Basal Cell Adenoma of the Upper Lip: Report of a Rare Case With Literature Review. Cureus. 2024 Jan 19;16(1):e52599. doi: 10.7759/cureus.52599. PMID: 38374835; PMCID: PMC10875275.

  • Mangal S, Padhiar B, Karia U, Shah BJ. Senile hemangioma of the lips. Indian J Dermatol. 2014 Nov;59(6):633. doi: 10.4103/0019-5154.143580. PMID: 25484424; PMCID: PMC4248532.

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