Avoiding the triggers like stress, irregular sleep, alcohol,
smoking, chinese foods can help. Over-the-
counter medications such as naproxen, ibuprofen, and acetaminophen can help in reducing the pain. Anti-emetics may help to control symptoms such as nausea and vomiting. He should take adequate rest and sleep. For best results it is best to get evaluated by a doctor and seek treatment. Do see a healthcare professional. I hope it helps.
Best wishes and take care!