• Masturbation in public view or at other socially inappropriate places
• Vigorous masturbation that causes frequent injury or infections of the genitals
• Spending unreasonable amount of time searching for online pornographic material in order to masturbate
• Feeling aimless, lost, or irritable because of being preoccupied with masturbation on a prolonged basis
• Feeling guilty about spending too much money to buy pornography that is used to arouse oneself during masturbation
• Frequently skipping or postponing something important, such as an interview or an assignment, in order to masturbate
• Compulsive masturbation, or the inability to stop oneself from doing it in spite of making an honest effort to do so
• Emotional distancing or conflict with partner because of masturbation related behavior

Even though masturbation per se may not cause any physical harm, excessive masturbation is a cause for concern because it may indicate an underlying psychological or sexual problem.