Obviously something is making him unhappy at school. It could either be the teacher [I presume that he was fine at school last year] or someone is bullying him. If you can't find out what is causing this problem it would be best to speak to the principal. It would be no use taking him to a clinical psychologist if the problem is one that can easily be identified.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.