Hi, Hives are indicative of an allergic reaction. Corticosteroids help reduce the inflammation and allergic reaction. It can take few days for symptoms to completely subside. So continue the steroid medication as prescribed. An antihistamine like Cetrizine can also be added to the treatment regime. You can also apply calamine lotion if itching is present. Also, make sure yo avoid further exposure to the allergen that triggers the allergic episode. Hope I have answered your query. Let me know if I can assist you further.