We start off at Sparrow Family Medical Services in Okemos.... where Doctor Michael McAlvey is seeing a lot of poison ivy....Symtpoms include itchy small blisters often in streak like formations. For treatment -- over the counter medicine such as Benadryl and Hydrocortisone can offer relief for mild cases.... Make sure to take a shower and wash all clothes, gloves, and shoes that may have come into contact with the oils. For severe cases prescription medication or shots through your doctor may be needed.