My scrotal sac goes up when aroused, is that a problem?

Testicles plural?

You have more than one?

I'm off to check myself again.

You may be gripping to tightly...or aiming back up toward your chest. Try aiming at something across the room at pelvis level or below...and you may not have that happen.

Or try it operating in the face down position...aiming at the bed or the floor.

It still may happen, but you won't be able to notice it.

In any case, as long as the orgasm is decent...and if your balls come back down when you are through...what difference does it make?

Unless it is just curiosity about whether the happening is unique to you...in which case, you will only get anecdotal information here...and you're better bet would be to ask your physician next time you see him or her.

A doctor would know best.

Sounds like 'Yo-yo Syndrome'.
Only start worrying if they stay up there and refuse to come down

http://www.innerbody.com/image_endoov/repo10-new2.html