Hi, my son had swelling and rashes two days ago, the pedi prscibed stereoids and benidryl to help bring swelling down, and referred us to allergy clinic. I was wondering why his swelling was mainly on the left side, if it s only an allergy, why wasn t it same throroughout? For example, both eyes were solle, but you could barely tell it on the right eye, and the left eye was nearly shut... Same with hands, feet, rashes appeared more severely on left as well