I was stung by a wasp on the inside of my wrist at 6 pm Tuesday night (it is now 5 am wed). The arm is getting swollen and red higher and higher up my arm...right now it is near by elbow crease. I had a spider bite on my stomach about 5 weeks ago where my entire belly area was very red and swollen. When I went to clinic was given a cortisol shot and tetanus shot and put hydrocortisone cream on the belly. Concerning my wrist bite, I called my insurance on-call nurse and she said it should be swollen only around bite area, but this is entire top portion of arm. She suggested going to ER but I don t want to do this unless necessary. What does a cortisol shot do for an insect bite? I thought it was only for joint pain. Please advise what you think I need to do and what might help with the swelling/pain (I have taken ibuprofen and Claritin and am icing it and applying alloy Vera.). Thank you.