Very much OUCH.Yesterday after wasp sting spray and multiple ice packs I was wondering why hornets have such a fearsome reputation. Today the swelling and redness is covering the base of my thumb and is heading to the inner elbow. It's extremely uncomfortable. Google tells me the swelling continues to increase for forty eight hours and can take seven to ten days to go down. Ok it's time to take antihistamine.
Do hope pain & swelling reduce asap, @SlimLizzy
Best wishes for a speedy recovery