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Published on: 8/20/2026

What could cause a lump on the perineum in males, and how should it be treated?

A lump on the perineum in males is often caused by a benign growth, such as a dermoid cyst or other type of cyst or tumor. While many perineal lumps are harmless, some may require medical evaluation to rule out infection, abscess, or other conditions. A doctor can determine whether the lump should be monitored, treated, or surgically removed.

Because perineal lumps can stem from a range of causes—some minor, others needing prompt attention—identifying the likely source early helps you make informed decisions about care. A free, instant, online symptom check can help you understand what may be causing your lump and guide your next steps, whether that means self-care at home or seeing a specialist soon.

Reviewed for medical accuracy: 07/15/2026

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A lump in the perineum—the area between the scrotum and the anus—can occur for different reasons. It might be a benign tumor, which means a growth that is not harmful, or it could be a cyst, like a dermoid cyst. A dermoid cyst is a small sac that grows slowly and is filled with tissue that is not harmful. Sometimes the lump may be an unusual swelling that makes you or your doctor wonder whether further care is needed. When you find a lump in this sensitive area, you can use Ubie's free AI symptom checker to better understand your symptoms before your appointment, and your doctor will examine it thoroughly. They might feel the lump, ask you if it causes pain, and look for other signs like changes in size or shape. In some cases, the doctor may order an ultrasound or other tests to determine the nature of the lump. If the lump is not causing problems, it may be watched over time. However, if it causes discomfort, pain, or grows larger, the doctor might recommend removing it through a simple surgical procedure. It is important to have any new lump evaluated to make sure you get the right treatment.

(References)

  • Erpenbach K, Rothe H. Perineale Tumoren beim männlichen Patienten [Perineal tumors in male patients]. Urologe A. 1990 Nov;29(6):350-3. German. PMID: 2291263.

  • Parnham AS, Freeman A, Kirkham A, Muneer A. An unusual swelling in the male perineum. BMJ Case Rep. 2015 Jan 22;2015:bcr2014206199. doi: 10.1136/bcr-2014-206199. PMID: 25612751; PMCID: PMC4307079.

  • Sloan M, Fantus RJ, Paner GP, Faris S. Perineal dermoid cyst in a young male. Urol Case Rep. 2020 Jul 22;33:101358. doi: 10.1016/j.eucr.2020.101358. PMID: 33102057; PMCID: PMC7573956.

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