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Published on: 8/20/2026

Is a painless lump between the scrotum and anus a cause for concern, and when should it be checked by a doctor?

A painless lump between the scrotum and anus (the perineum) is usually not serious. Common causes include a sebaceous cyst, an ingrown hair, a benign skin growth, or a mild hernia. However, you should see a doctor if the lump grows, changes shape, becomes painful, or is accompanied by symptoms like fever, difficulty urinating, or discharge.

Because a lump in this area can have many possible causes—ranging from harmless cysts to conditions that need treatment—identifying the likely cause early can help you decide whether to monitor at home or seek care right away. A free, instant, online symptom check can help you narrow down potential causes based on your specific symptoms, guide you on urgency, and clarify your next steps—all in just a few minutes and without any cost or signup.

Reviewed for medical accuracy: 07/15/2026

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Explanation

A lump in the area between the scrotum and anus can sometimes be a harmless growth, like a lipoma (a small lump of fatty tissue) or extra tissue that is not dangerous. Because it does not hurt, it might not be causing harm at first.

However, even if it is painless, it is important to have it looked at by a healthcare professional. If you're uncertain about your symptoms or want guidance before scheduling an appointment, you can check your symptoms with Ubie's free AI-powered tool to better understand what might be happening. The doctor can examine it to make sure it is not growing or turning into something more serious, such as an infection or a rare tumor. If you notice that the lump grows in size, changes shape, or if you begin to feel other symptoms like pain or redness, you should see the doctor sooner.

Getting a professional opinion helps catch any possible problems early and gives you peace of mind. Even if the lump stays the same, having it checked can confirm that it is harmless, and you can be sure that you are taking good care of your health.

(References)

  • Aldean H, Pantling A, Raja MA. A painful buttock lump: common complaint, rare diagnosis. JRSM Short Rep. 2010 Aug 31;1(3):26. doi: 10.1258/shorts.2010.010046. PMID: 21103118; PMCID: PMC2984350.

  • 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.

  • Rupp TJ, Leslie SW. Epididymitis. [Updated 2023 Jul 17]. In: StatPearls [Internet].

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