Does he having a feeling to come out of this habit!
Do sit and talk to him. Try to spend enough time with him as parents. Make him understand that you both are there for him as his support both physically and mentally.
Then, take him to a psychologist and a psychiatrist.
Disclaimer : The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding your medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.