 [ Symptoms ] i have cast itch is there a product i can buy that has an extended aerosol spray to help with the itching [ Disease ] do not put anything inside the cast this could irritate the skin with small micro cuts which can lead to an infection do not use talc or creams inside a plaster cast these become gritty when mixed with sweat which could also irritate the skin and cause an allergy or infection raise your arm or leg up above chest level for about 1 hour this can help reduce the swelling and cool the area which would decrease the itch if it is too intense talk with your pharmacist about using an oral antihistamine for the itching be cautious about drug drug interactions or drowsiness if the itching is still too intense check with you doctor about recasting the area