He needs counselling. + medicines also. Consult a psychiatrist as well.. Need to identify the reason behind this. Also we need to know what motivates him.

Kudos to your concern and taking initiative for your sibling's well being. The following is addressed to him : When you begin to focus on what's calling for your attention and needs to be addressed within you, you will be able to overcome the challenges you are dealing with right now. A beautiful future awaits you. Give yourself permission to deserve it and own it. Here are a few links that could be helpful : https://fit.practo.com/#!/content/41615 https://fit.practo.com/#!/content/41642 https://fit.practo.com/#!/content/41716 https://fit.practo.com/#!/content/41742 https://fit.practo.com/#!/content/41735 https://fit.practo.com/#!/content/41617 https://fit.practo.com/#!/content/41616 https://fit.practo.com/#!/content/41727 https://fit.practo.com/#!/content/41639 Step One https://fit.practo.com/#!/content/41640 Step Two https://fit.practo.com/#!/content/41641 Step Three https://fit.practo.com/#!/content/41645 Step Four Our attitude towards life in general and things in particular is based on our Beliefs - what we believe to be true about ourselves and the world. What are your core beliefs about yourself and the world? Try writing them down and examine the validity of these beliefs. Some of them may be limiting and negative in nature because of some of the feedback you might have received in the past - at home, in school, from your classmates, friends, relatives, etc. But once you are aware of them, you shed light on them,examine their truth, they can no longer manipulate your behavior or actions. As your beliefs change, your attitude changes, and words, actions and behavior follow. Whatever you feed your mind through your sense organs have an impact on your psychological and emotional well being. Be conscious of this. Take care of the content you feed your mind - the kind of books you read, the websites you visit, the kind of music you listen to, the kind of food you eat, the kind of company you keep ( "You are an average of five people you spend most of your time with" ) Our challenges that seem to threat our very existence serve as fuel for our evolution. Please set aside time for exercise daily and try to eat healthy every time.