Sir/Madam,  

I am 28 years old and unmarried male. I m suffering from the problem of nightfall. In a week, it happens 3-4 times. I have tried many ayurvedic medicines. I also took one allopathic medicine - Serta-50 (from Unichem). This English medicine worked as long as I took it but when I left this medicine, the problem started once again. Ayurvedic medicine also works lightly and the problem persists. 

When I dream any sexual things, then nightfall occurs compulsorily. Actually, throughout the teenage, I have masturbated. I have masturbated not using my hands but rubbing the penis on the hip of pillows. In my childhood I might have rubbed my scrotum also on hip of pillows, but I don't remember about this exactly. 

But i have left masturbation completely since the past one year. Someone had suggested me that my pelvic muscles have become weak due to which frequent nightfall occurs. I am doing some yogasan to strengthen my pelvic muscles. I am afraid that masturbating in the style mentioned above have caused any serious problem in epididymis, testes or any other genital organs. 

At the same time I want to mention that I do not feel any kind of pain or enlargement of scrotum or any other genital organs. I also do not have any other problem of sex like dysfunction of penis or anything. What should I do? Should I go for ultrasound/X-ray of my genital organ to get the root cause of the problem?