What are the symptoms of dermatitis?

Patient's question:

What should I do if my one-year-old baby's buttocks keep getting red spots? One and a half months

Doctor's answer:

Disease Analysis: Corticosteroid-dependent dermatitis (abbreviated as steroid-dependent dermatitis or steroid dermatitis) is a type of dermatitis caused by the long-term and repeated improper external use of topical medications containing steroids. In recent years, due to its significant increasing incidence and stubborn, difficult-to-treat nature, it has become a focal point of attention for medical experts.
Guidance: After applying the aforementioned steroid medications, the condition of the primary disease can be rapidly improved. However, once the medication is discontinued, within 1–2 days, the skin at the application site develops significant symptoms such as erythema, papules, fissures, scaling, small pustules, itching, and tenderness. When the medication is reused, these symptoms and signs quickly subside. If it is discontinued again, the dermatitis symptoms will rapidly recur and gradually worsen, showing a clear dependence on the steroid, particularly in the facial and external genital regions.