question: Hi, I am 25, male and quite healthy. But, for the last 15-20 days I am experiencing slight pain in my left testicle and have discovered something as a lump on it. It seems the lump is on the testicle itself and not on the skin. The pain persists throughout the day. These apart, I have not experienced anything unusual as far as the functions of my testicles are concerned but am rather afraid about the lump-like thing. Please help