While I have my doubts that the OP is sincere in wanting actual advice, I will add this for anyone Googling with a similar problem:
Needing to masturbate every 5 minutes is *not *normal. No, not even for a 15 year old boy. And yes, it can hurt. Skin on the penis can break down, crack and bleed, the urethra can become inflamed, making it more prone to infection, which can turn into bladder or kidney infections which can be actually life threatening. That’s not to mention the social and psychological damage such a preoccupation can do to one’s work life and relationships. Seriously, how do you have a productive conversation with your boss or mother if you’re constantly thinking about wanking and running into the bathroom to pull one off every 5 minutes?
Back when I was running an alt-med clinic, we had a young man in who was really into raising his kundalini through yoga, and became a chronic masturbator of the “every 5 minutes isn’t enough” variety. Eventually, he began ejaculating blood. Seriously. Not good. (In his case, a medical exam was clear, and he was successfully treated with acupuncture, herbs, and some spiritual counseling to get him to try yoga that wasn’t so focused on raising specifically genital area kundalini energy.)
First step IS a medical exam. Just in case there’s a tumor or infection or something else pathological causing the arousal. Only after physical causes are ruled out should one turn to psychological/spiritual treatment methods.