Hallo. I am 18 years old , and i have been having problems with my testicle for about 6 month now. Sometime i get a dull ache in my testicle. The ache is not painful , or is it that  irritating.  The dull ache is not  always there and sometimes does not happen for a day or two. I went to the doctors  and have already have had a full check up on my testicle twice. The first time they only found a air bubble and the second time they found nothing. Has anyone else had this experience , and what can i take or do.