I have a wasp sting from yesterday. and i'm not sure if it is spreading redness or not. it itches, is red, and is a little warm to the touch. it might be spreading in a circle around the sting very slightly, but i am worried about cellulitis. worry?

Local reactions of warmth, swelling and redness are common after a wasp or yellow jacket or bee sting. This is a reaction to the venom and local injury. Cellulitis would take a couple days to take hold. Meanwhile, apply cool wet compresses to the area and take some acetaminophen/Tylenol. If you are able to take ibuprofen, this will help with the inflammation if taken over the next few days.