question: Hello doctor, I have pain while urinating. I had a white clear discharge from the penis. Now gone. Yesterday I found a small lump on the testicle. I went to the clinic before getting the lump. Tested clear for HIV, syphilis, gonorrhea, chlamydia, and microplasma. Given antibiotics which cleared the discharge but not the irritation when peeing. Found a small lump or spot on testicle yesterday. What is the cause of this?