Dr. My right knee is paining continuously, this generaly immediate after I masturbate then pain reduces as days pass. X ray report of both knees are normal, also there is cracking sound of patela. Is it due to excessive masturbation, people say that sinovial fluid is dried due to over masturbation, I am doing it from small age. Also can you suggest where I can have mri scan done in less charitable rates. Please suggest me whether it is curable.