Watch him like a hawk. I'd put him in a bath immediately and wash any residue off thoroughly.
Any rubbing of eyes, redness, puffiness on his face etc, give him Benadryl and get him to ER. Anything around the mouth, breathing, lips swelling, or that makes you fearful, dial 911 immediately.
If he has any reaction at all, however minor, get him allergy tested asap. For your own peace of mind, you might then want to get an epipen to carry and ensure a peanut free environment for him.
HTH
Any rubbing of eyes, redness, puffiness on his face etc, give him Benadryl and get him to ER. Anything around the mouth, breathing, lips swelling, or that makes you fearful, dial 911 immediately.
If he has any reaction at all, however minor, get him allergy tested asap. For your own peace of mind, you might then want to get an epipen to carry and ensure a peanut free environment for him.
HTH