Skin lumps are any abnormal bumps or swellings on or under the skin.
Considerations
Most lumps and swellings are benign (not cancerous) and are harmless, especially the kind that feel soft and roll easily under the fingers (such as lipomas and cysts).
A lump or swelling that appears suddenly (over 24 to 48 hours) and is painful is usually caused by an injury or an infection.
Home Care
Skin lumps from an injury can be treated with rest, ice, compression, and elevation. Most other lumps should be looked at by your health care provider before you try any home treatments.
When to Contact a Medical Professional
Call your provider if you have an unexplained lump or swelling.
What to Expect at Your Office Visit
Your provider will perform a physical exam and ask about your symptoms, including:
- Where is the lump?
- When did you first notice it?
- Is it painful or growing larger?
- Is it bleeding or draining?
- Is there more than one lump?
- Is it painful?
- What does the lump look like?
- What other symptoms do you have?
Your provider may prescribe antibiotics if you have an infection. If cancer is suspected or the provider cannot make a diagnosis by looking at the lump, a biopsy or an imaging test may be done.
References
James WD, Elston DM, Treat JR, Rosenbach MA, Neuhaus IM. Dermal and subcutaneous tumors. In: James WD, Elston DM, Treat JR, Rosenbach MA, Neuhaus IM, eds. Andrews' Diseases of the Skin: Clinical Dermatology. 13th ed. Philadelphia, PA: Elsevier; 2020:chap 28.
Seller RH, Symons AB. Skin problems. In: Seller RH, Symons AB, eds. Differential Diagnosis of Common Complaints. 7th ed. Philadelphia, PA: Elsevier; 2018:chap 29.
Review Date 6/7/2023
Updated by: Elika Hoss, MD, Assistant Professor of Dermatology, Mayo Clinic, Scottsdale, AZ. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.