i am 22 year old and i masturbated for last 5years and i feel problems like back pain ,eye sight,and tired almost please suggest me i am 22 year old and i mastubated for last 5 years its fun for me for some 2 years i masterbated 7-8 times in a week but after some months i started facing problems like back pain,eyes sight problems, tired yet i did not concern with any doctor . how can i overcome with these problems.most of time i heard that masturation it not harmful then why i'm facing such problems...please suggest me