Thanks for posting your query.
The sensation of bugs crawling on the skin specially at night is most likely related to anxiety. The other causes may include vitamin B complex deficiency, allergic disorders, hormone imbalance
problems or bug infestation.
You can try to calm him, start with anti allergic like Benadryl
and give him a healthy diet with vitamin B complex supplements for at least two weeks.
Topical application of moisturizing cream like aloe vera
gel will be helpful.
In case the symptoms are persistent then do consult a dermatologist
for a physical examination to rule out any bug infestation.
I hope this answers your query.
In case you have additional questions or doubts, you can forward them to me, and I shall be glad to help you out.
Please accept my answer in case you do not have further queries.
Wishing you good health.
Dr. Praveen Tayal.