My right testicle is tender and goes up in the socket?

Needs checked: You really need to see a physician and have this checked, it is difficult to answer without a physical exam.

?Retractile testicle: Retractile testes can retract up and out of the scrotum, after puberty are usually too large to leave the scrotum + cremaster muscle, which pulls up the testes, is much weaker. Retraction is normal before puberty. See a urologist if the retraction is very uncomfortable, in which case division of the cremaster muscle surgically can take care of this problem.