Over masterbation causes hair fall and depression ,thinning of hair? i also not gaining weight from last four years . i am doing masterbation since15.

Masturbation: Causes none of these problems. Look for another cause, perhaps nutritional?

Masturbate effects?: There is no evidence that masturbation causes any of the symptoms you described. Persons feelings about it and social teachings are often the only reasons that masturbation might cause any distress such as anxiety depression. It sounds like it might be prudent to meet with your physician or other health care providers to address the physical and psychological symptoms you described.