Hi thanks for contacting HCM.... The masturbation is healthy pleasure giving activity..... There are many articles written on it... But let me know you over practise of it is not good ...Up to few times in week it is OK . But if you have excess , compulsive habits then yes it can lead certain harmful effects in body both physiologically as well as psychological.... Here are few adverse events like....... -chronic fatigue -Back pain -anxiety -mood affection -lack of concentration -insomnia -premature ejeculation -groin discomfort etc...... So try to avoid excess compulsive masturbation. Take care. Hope your concern solved.