Sounds bad, maybe your underwear is to tight , I'd suggest a trip to the clinic and getting checked out. If underwear is to tight a trip to the mens briefs section of your favorite retail store, Good luck,
Ummmmmmm I thought the only one to be responding to medical questions here was the Healthnurse? https://perb.cc/vbulletin/showthread.php?t=39110 See post #2.....Now we have Mods and Perbs spouting off?????......Wish jjinvan was here to wade in on this.......
There are a number of conditions that can cause your balls to ache.
Epididymitis is a condition that we see in our clinic and the symptom is pain in the balls. This can be caused by an STI such as gonorrhea or chlamydia. These STIs can be easily treated with antibiotics.
I would recommend that you visit a doctor for testing and an examination. The longer that an infection is left untreated the more likely there can be complications.
Here is a link for more information on epididymitis;