How to stop my balls from hurting?

See doctor: You may have an infection - see your doctor. If it is severe pain causing you to double over, go to er to rule out torsion.

Depends: On why your balls are hurting. In young healthy males this is often related to vasocongestion or "blue balls", which can relieved with masturbation. Alternately, too much masturbation will also lead to sore testes.