Area near my private part pains alot.

The area of my private part which consists the balls pains alot sometimes My penis doesn't pain but the balls part pains alot and also slightly upper area towards the stomach from my private part also pains at the same time. I don't know why this happens but this happen sometimes and it pains like hell,i can't even walk properly when pain occurs because the area of balls got in contact with my legs. Sometimes i thought it may be because of gas issues because it happens when i am hungry till afternoon or more and also i have constipation issues every 2 days or 3 days. So i went to a local medical shop and they  gave me Pantop D tab. and said to eat it for 3 days in empty stomach and for 3 days i have not felt that pain But after somedays the pain started When it pains it stays for almost half a day and i am on my bed resting all that time. This pains occurs almost 5-8 times in one month.