Approximately 3 weeks ago I noticed a blister/pimple like sore in the center of waistline. It looked like a mix between a bug bite and a pimple and it itched. Enough that I popped it until puss came out. That day I noticed a hive like rash that spread throughout my body, mostly on my upper half. By the next evening I had the rash all over my legs and back as well. I took Benadryl and that cleared up by the next day.
Shortly thereafter I noticed a similar bite-like pimple on my left shin and this also itched. It scabbed over in the center and had somewhat of a ring around it. It itched for a while and is still scabbed over.
Now for about 2-3 days I've felt pain when wiping beyond my anus, almost like there is a papercut there somewhere. Now I woke up with itchy sores around my anus. I have no idea how to diagnose this, can anyone help??