<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi there, Ive been for an ultrasound and it confirms I have a lump inside my testicle left. My GP believed it was an epididymytis and prescribed Doxycycline. I have to wait up to two weeks to see a Urologist. Can you tell me what the possibilities are? The lump until today was aching and my scrotum felt very tender and heavy. Im on day 5 of the antibiotics; the pain has gone but the hard lump is still able to be felt on the left side of the testicle...  <response>: Welcome to Chat Doctor .1. The possibilities are benign lumps inflammatory infections malignant causes.2. You have said that its getting better after treatment, so you have better see for few more days and does not relieve, you have to get a biopsy taken from the lump.3. If symptoms still persists you have to see your urologist. Hope it helps you. Wish you a good health. Anything to ask ? Do not hesitate. Thank you. 