2yo had rash thought to be poison ivy for 2 weeks. when that went away he started getting random fevers and/or hives, one day he had a swollen eye. tjis has been going on for 2+ weeks. doctors say he looks healthy otherwise, what could it be?

the poison ivy poison (cell sap) can stick to cloths and blankets and pets. I am amazed that you can ask such a question at age 2. Very good. Ask parents to wash all clothes that may have been when you got exposed and if at home to not let pets or you out to play where poison Ivy grows. Ask them to also check the meds being used for allergic reaction possibilities. Ask them to call your Drs.