Red, flat, non-itchy spots covering feet, lower legs, upper thighs, and buttocks. Have been to ER when first noticed in August. I have visited several dermatologist and doctors. I have had several labs done all coming back normal, besides a slightly high monos. The doctors did a punch biopsy and notified me that “there was no fibrinoid necrosis of vessel walls seen, the presence of perivascular fibrin with associated leukocytoclastic debris and extravasated erythrocytes is consistent with an evolving acute vasculitis, and likely represent a leukocytoclastic vasculitis.” There are no other symptoms besides the rash, which the dermatologist identified as a petechiae rash. My father and brother have type 1 diabetes and mother has high cholesterol. I am reaching out because this is now the worst the rash has been since August. I am very allergic to cats and was around one for a few days and was taking Claritin. If I were to guess possibly an allergy to allergy.