I am masturbating since I was 12 years old now

Patient: I am masturbating since I was 12 years old now I am 15 years old and I am suffering a pain in my left hand between joints of my ankle and between the joints of biceps. Whenever I lift a object with my left hand a severe pain is coming I think its because of masturbating what can I do pls suggest some ways and how should I stop that habit

Doctor: