I have a lump on one of my testicles. What should I do? You should tell your mom or dad about any lumps or swelling in your testicles. You will need to visit the doctor. The doctor will have to examine your testicles and feel for the lumps. It shouldn't hurt and it's the best way for the doctor to check it out. Lumps in the testicles could be many things. Some are perfectly normal. For example, you may be feeling the epididymis, the tightly coiled tube where sperm are stored. Other lumps may be signs of a problem that won't go away on its own, so tell your mom or dad and then see the doctor. See more Personal Questions Back to Articles Related Articles Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.