Yeh check your balls ureself, feel a lump protruding from ure testicle, it might be some kind of tumour, but don't shit ureself just yet cuz it might not be malignant, there are many benign tumours that grow on many parts of the body as it is a natural defence mechanism against tissue stress. If you have a lump, that is almost a seperate bollock, on the top of ure testicle, and you can fit ure finger between the lump and your testicle, then it is most probably a hydrocele/varicocele, which is nothing to worry about maaan, either way it will not always point to cancer, they really are scare stories, but go whop ure cock out in front of a professional already and stop asking potheads :D I worried myself for like a year cuz I had that shit, constantly thinking about it will increase the pain aswell, but then within five minutes of a man poking around my scrotum, my mind was put at ease, plus its a surreal experience to walk in to a doctors room and pull ure balls out.
For info on testicle lumps go to this, its a small site that just summarizes the different types.
http://www.netdoctor.co.uk/menshealt...cularlumps.htm
http://www.netdoctor.co.uk/diseases/facts/hydrocele.htm
Oh and no matter how professional the doc tries to be about it, its still funny as fuck.