999 dermatophyte, also known as compound dexamethasone cream, side effects of long-term use will cause skin atrophy, capillary dilatation, hyperpigmentation, secondary infections, and occasionally allergic reactions. Compound dexamethasone cream is a glucocorticosteroid drug, clinical mainly for limited pruritus, as well as neurodermatitis, contact dermatitis, seborrheic dermatitis, and chronic eczema and other diseases. Side effects of long-term use may lead to skin atrophy, capillary dilation, hyperpigmentation and secondary infections, and occasionally allergic reactions. Contraindications include: patients with ulceration and pus and patients with obvious exudation, viral infections are prohibited from use. There is a need to find a doctor to check the need for medication first, under the guidance of the doctor to use medication, to avoid their own abuse of drugs.