Generalized dermatitis generally refers to neurodermatitis, which has symptoms such as itching, flat papules, and scaling. Neurodermatitis is a chronic inflammatory skin disease caused by a variety of factors, the cause of which has not been clearly defined, and may be caused by neuropsychiatric, scratching, chronic friction, improper diet, sun exposure and other factors. Patients may have single or multiple flat papules fused into a mossy skin lesion, which occurs on the neck, back, elbows, waist, tailbone, etc. At the beginning of the local itching, due to scratching of the skin, there will be a deep groove, elevated typical mossy lesions, accompanied by scales. In some cases, the itching is so severe that it interferes with sleep and daily activities, and the lesions are accompanied by pain, ulceration, pustules and other symptoms. Once the symptoms of neurodermatitis appear, it is recommended that the patient go to a regular hospital in time to have a relevant examination, so as to clarify the cause of the disease, and actively take relevant treatment measures. During the treatment period, avoid scratching the skin to avoid secondary infection, and keep the skin clean and dry.