My son has red bumps on his face around his mouth. i'm pretty sure it is an allergic reaction, is that what it is?

Anything: It could be anything. Give him some benadryl, (diphenhydramine) but if not better, have him seen by his doctor. If it gets worse, bring him to the er.

Maybe: It can be. When suspecting allergy, this type of rash is usually a form of contact dermatitis. He may be having a contact allergy likely to a food. Talk to your pediatrician or allergist to help you figure it out.