I am facing some issue with hard erection from 3 days, before this 3 days I use to masturbate with good and hard erection, do not know why I am unable to masturbate. I am trying to do forcibly then my penis is getting half hard and able to ejaculate but not hard as it was 3 days before. And from a week I am little sleepless and stomach was badly upset. To Whom should I consult fir this type of problem. Two months before one of my friend was hit on my testicles and I felt a very minute pain for one day after that never feel any pain.