I masturbate a lot something like 2 / 3 times per day at most . the problem i feel pain in my lower back , my joints pops up ?

May take motrin: Vigoruous males your age commonly have a vigorous sex drive, so this is common. The pain in your back can be treated with motrin 600 mg 4x/day. The joints popping does not indicate any disease - I am assuming that the joint is not out of place, just making a popping sound. You can look up some back exercises to do to help your aching back on the internet.