What are the potential causes of a lump between the scrotum and anus, and how is it diagnosed?

When you notice a lump between the scrotum and anus, it could be due to several reasons. One possibility is a perianal abscess, which is an infection that causes a small pocket of pus to form near the anus. Another potential cause is epididymitis, which is an infection or inflammation in the epididymis (a tube behind the testicle) that may sometimes lead to swelling that feels like a lump. In some cases, the bump could be a simple benign cyst that is not harmful.

Doctors start by asking about your symptoms and then perform a careful physical exam to check the area. They will look at the size, shape, and tenderness of the lump. To see more clearly what is causing the lump, your doctor might suggest an ultrasound. This simple test uses sound waves to show soft tissues and can help determine if the lump is an abscess, epididymitis, or another kind of growth. If you're experiencing symptoms and want to better understand what might be causing them before your appointment, you can check your symptoms with our free AI symptom checker. With this information, the doctor can recommend the proper treatment or further testing if needed.