i have examined my testicals and found no lumps on them, i have been experiencing pains, pains being perhaps described too strongly, its more of a discomfort than anything. my epididymis tubes are to the left of my left testical, i sometimes get them mixed up with lumps, but after close examination no lumps are actually on my testicals. why have i this discomfort? i am aged 20 and a half, they dont seem to be getting bigger but could they be growing pains?