Allergic reaction

Brandy

My baby is 2 months old and broke out into a allergic reaction. I brought him to the ER and they said there is nothing they can do because he is so small and sent me home. Just to stay alert for lips swelling. What can it possibly be? I used nothing new on him, myself, around the house. I’m not sure what to do to help him 😞

The rashes come and go in new places.