<s>[INST] i just noticed blister looking bumps on my sons neck, (front and back of the neck), and a small one on both eyes, and one on his mouh. I just found out he was given tuna, at his 1 year bday party, three days ago, and baby corn caserole, he has never tried any of these things before. Could it be an allergic reaction to the tuna, and corn? [/INST] Hello,I can understand your concern. Yes, there is a chance that the child is allergic to either corn or tuna. I would advise you to visit a pediatrician for the prescription of the antihistamine to control the allergic reaction. If the ulcer in the mouth is painful, you can apply local Benzocaine gel over that such as Mucopain, 3-4 times in a day.If he develops recurrent episodes of such allergic reactions, you should go for a blood test that evaluates what substances the child is allergic to so that the exposure can be avoided in the future.I hope this information helps you. Thank you for choosing HealthcareMagic. I wish the child feels better soon.Best,Dr. Viraj Shah </s>