I'm just wondering if anybody knows what's going on here. I'm only 19 years old but my left testicle seems to be way too sensitive. I've checked for lumps for cancer and haven't found anything, the only thing I could attribute it to is when I was 14 I was kicked really hard in the left one and it's been sensitive ever since. Now, it seems just sleeping a little too wrong, having the pressure of a bladder being full to long, or any mild trauma will cause them to hurt like a health forum for the next few days and often swell up (mainly on the left). And the pain is always on the left, though i've noticed a slight sensitivity in the right on occasion, probably just referred pain though. So I don't know what to make of this, but i'm sure hoping it's not something serious. Any help would really be appreciated.