I am worried I have a severe problem. I have aching in my testicles, sometimes its the left, sometimes its the right, or both. This sarted back in October after I started taking a testosterone booster. I certainly wouldn't think that has anything to do with this. I stopped a month into taking them because of this, shortly after the fact I cant remember them hurting bad enough to notice. I do remember an occassional ache. This last Saturday it started again, but worse than ever. I have lower back pain which can be severe at times, have for a long time, but this sympton never existed. Tonight I have experienced some nausea and dizziness too. I cant find bumps on my testicles, there appears no swelling or redness. I dont remember any severe injury to them. My sperm is pretty thick along with an off white color, I am colorblind so not to sure on that one. I can take some advil and after awhile it seems to subside alittle. I am not sure what is going on but scared. This is an very obvious ache bordering on pain that is becoming consistent. It has not stopped recently longer than minutes at a time. Help, please.. Do you think I may have a disease, injury, or potential cancer? Is it possible to have cancer without lumps on testicules? Would any disease cause these symptoms?