Hello and hope you are doing well.
Yes mam, he should be seen by his doctor. As it could be Quinsy, which is peritonsillar abscess, that is there is pus collection around the tonsils. This is an emergency and needs to be treated with IV antibiotics. Sometimes it warrants incision and drainage of the abscess. It is also an indication for tonsillectomy. So, consult your doctor at the earliest.
Hope this helped and do keep us posted.