Hydrocortisone is a corticosteroid medication widely used in the treatment of inflammatory and allergic conditions. Its active substance is the hormone cortisol, which occurs naturally in the body. Hydrocortisone works by reducing inflammation, suppressing the immune system, and alleviating symptoms associated with conditions such as dermatitis, eczema, allergies, asthma, and autoimmune diseases. It can be administered topically, in the form of a cream or ointment, to treat skin issues, or orally or by injection for more systemic conditions. It is important to follow medical guidance regarding the appropriate dosage, treatment duration, and possible side effects.