What can cause intermittent aching in 1 testicle? i have not injured the area.i get an ache that last approx 20/30 seconds several times daily

Long list: Infection, torsion, inflammation, symptomatic hydrocele or varicocele, inguinal hernia, cremasteric muscle strain just to name a few. Best to have medical evaluation to help sort this out for you. Hope this helps. Best of luck. Dr R

Here are some ...: Your described testicular pain is more likely related with neuromuscular origin resulting from the referring pain by neuropathy / radiculopathy related with herniated disc. For a man of 16-25 without Hx of back problem, I incline to worry about possible intermittent testicular torsion if the pain is highly variable in its degree, duration, & interval. For detail, ask Doc timely.

Testicular ache: It is not unusual to experience achiness or sensitivity in a structure called the epidiymis in the back portion of the scrotum. Without injury but with routine activity this area can become sensitive and cause an ache to occur intermittently. Assuming there is no swelling or other sign of infection, wearing supportive underwear and using aniinflammatory medication such as advil (ibuprofen) usually helps.