Locoid Ointment contains the active substance hydrocortisone butyrate.This is a corticosteroid which when made up as an ointment is for use on the skin.This is known as topical application. Topical corticosteroids are ranked as mildly potent, moderately potent, potent and very potent; Locoid Ointment is classed as potent.Topical corticosteroids are able to reduce the inflammation caused by a variety of skin conditions, and so allow it to get better.They can also affect the cause of the condition, which can lead to its healing. Locoid Ointment is indicated in adults, children and infants. It is used to treat a variety of skin conditions that respond to topical corticosteroids. Among these are eczema and dermatitis (itching) of all types including atopic (childhood) eczema, photodermatitis (itching caused by exposure to light) and dermatitis caused by skin irritants and allergies. It can also be used in the treatment of psoriasis, a condition resulting in thickening of areas of the skin. It is important that you follow your doctor’s instructions particularly in psoriasis, and use it only on small areas on the scalp, hands or feet.The original symptoms may return if you stop using Locoid Ointment prematurely