To do a testicular exam is best to do it when your scrotum is relax in your testicles are hanging lower. Usually that happens when you're in or just after you get out of a hot shower.

He will want to look in the mirror and assess the general size of each testicle they should be close to the same size but it is OK for one to be a little bigger than the other is also normal for one to hang lower than the other.

With your Thumb and pointer finger feel the surface of each testicle separately checking for any bumps or lumps. There will be your epididymis which feels kind of like a lump on the top and bottom Of your testicle and those are normal.

You should do this about once a month. Once you know what your normal feels like we will be able to detect any changes if they come up.