Hi Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern...
Masturbation is not a disease, it is naturaldoes not cause any physical damage. However excessive masturbation could be harmful to your future sex life.
Excessive masturbation can cause keratinization (hardening of mucosa) of
glans of penis. Which can cause penis insenstive to normal stimulation during sex. This may cause lack of pleasure during sex & inability to ejaculate during sex.
However Feeling of sleep, weakness or less power is a normal feature after ejaculation. According to me loss of hair should not be related to masturbation, It should be related to excessive
testosterone produced in your body.
To reduce masturbation, You should try to focus more on your studies, sports activities,etc. You should should avoid watching porn/adult content. You could sleep in such a way (such as tight clothes, wearing gloves etc) that your hands could not gain access to your penis.
Hope this information helps
Good luck