I have a small bump on my testicle, doesn't hurt or anything, looks more like boil, what could be ?

Here are some...: The mention of "... looks more like boil ..." suggests the small lump is beneath the skin of the sac (scrotum), which most likely represents a sebaceous cyst - a cyst of overactive sebaceous gland of a hair follicle, and is harmless as long as being not infected like acne. Nonetheless, a direct look at it is essential to verify what it is. So, seek evaluation and counseling timely.