Can i do permanent damage to my penis from excessive masturbating? can it damage my penis tissues or muscles and if so is it permanent?

As long as you are not creating actual abrasions on the skin or doing anything violent, you are not causing any damage and you will not have any long-term effects from masturbation. Good luck.

excessive- is a vague term and can mean different things. if you think you masturbate a lot- then cut it down to what you think is not excessive. In the short run 'excessive' will not cause any harm. Moderation in everything is good. Good luck