Dear gautamkhandelwl57, Hand practice is natural and safest way to release sexual tension
and doesn't affects general health in any way. its negative propaganda created by quacks hence creates misconceptions in young peoples mind no body can do either sex or hand practice too much the body itself stops responding to sex. so make it clear that all you are feeling or thinking that your eyes hand sunken and feeling general weakness is may be due other reason than hand practice do consult physician or qualified sexologist
he will try to make you understand your problem and will take care of your all problems.