Hi, i am 19 years old and Last night I found a small lump on the bottom of my right testical. I couldn't help but panic. So i looked up testicular cancer and it says that the lump would be painless and it is. It said you would have pain in your lower back and stomach and i dont have pain there. It said scrotom would swell and mine has not done that ever. I also noticed that the lump was bigger yesterday after i ejaculated, than it is this morning. I was wondering if anyone could tell me what they think.