Is excessive masturbation harmful to a man’s health? Side effects of masturbation

Excess of anything can be harmful. Masturbating excessively can cause:

fatigue
weakness
early ejaculation
may also inhibit sexual activities with your partner
injury to the penis
vision changes
lower back pain
testicular pain
hair loss
If you find yourself excessively masturbating, you may want to divert the excessive energy in a more healthy way, such as :

yoga
meditation
listening to music
joining dance classes
following an exercise routine such as aerobics, running, cycling, swimming etc
If the tendency persists, you may want to consult a psychiatrist or a counsellor as it can also be related to mental stress.