Masturbation itself is harmless to human body. Frequent masturbation will affect your health and your muscles will not get smaller. Its harm is mainly manifested in the central nervous system and systemic symptoms, such as kidney deficiency, backache, hyposexuality, impotence, premature ejaculation, no ejaculation, insomnia, dreaminess, dizziness, palpitation, memory loss, and decreased understanding. Chronic prostatitis, urogenital diseases, etc. I suggest you go to the hospital for a check-up and follow the doctor's advice.