just give it a rest my friend. it is not likely that you cause testicular damage from overly-masturbating but you can cause enough trauma to have discomfort. if your symptoms persist you will need to see your medical provider but i suspect a few days of rest and recuperation will give our over-worked boys time to completely recover.
i have a small dull ache in my left testicle after i masturbated too much. i'm 18 years of age anyway i masturbated way more than usual during the week it occurred i'm not that worried as i have searched for lumps or mass and everything seems ok. an answer would be much appreciated