<s>[INST] Sir/Mam, I have noticed a lump that is little smaller than a pea on the head of my right testicle. I googled it and found, it is the area where epididymis meets the head of the testicle. I have no pain or any other symptom below my belt. Also, the lump is hard to feel. It is laying there for about 8 months. I am little worried about cancer. Please help...... Rachit Narindra (Male, 18 Years) [/INST] You 1st need to be certain that it is in your scrotal skin or inside . That is in the testis. If on skin it is usually a sebaceous cyst. If inside... Get and ultrasound done for the testis. Any good radiologist can easily diagnose its origin and also the cause of it. This way u can be sure that it is not a cancer. Testicular cancer is one that appears in adolescent males... So better get it checked. Hope I helped. Do get back to let me know what it turned out to be. Mostly they are epididymis cysts.... But better get a USG done. </s>