 [ Symptoms ] sore testicle with no apparent reason  for about 2 days not the my left testicle has had a sort of dull ache as if i got hit there earlier i do not believe i was hit by anything – nothing in particular happened i more just slowly became aware of the soreness i am a 20 year old male in fairly good health i have no history of testicular cancer in my family or any testicular maladies of any sort should i be concerned should i wait a couple more days and see if it fades away or is do i need to get this checked out as soon as possible [ Disease ] make the medical appointment to get it checked out orchitis an infection of the testicle epididymitis an infection of the epididymis as well as other causes need to be considered having a diagnostic exam will certainly relieve any anxiety about testicular cancer happens at your age too