Usually, severe cases are treated with systemic corticosteroids which may be tapered gradually, with various dosing schedules ranging from a total of 12 – 20 days to prevent the recurrence of the rash (while the chemical allergen is still in the skin, up to 3 weeks, as well as a topical corticosteroid.[1] Tacrolimus ointment or pimecrolimus cream can also be used additionally to the corticosteroid creams or instead of these.