Mild symptoms can be cured after 7~14 days after effective treatment, more serious or not effectively treated people have a longer healing time, and very serious people can be up to several months or years time. There are many types of dermatitis (contact dermatitis, atopic dermatitis, seborrheic dermatitis, neurological dermatitis, etc.), patients need to identify the cause of the disease after targeted treatment. 1. Contact dermatitis: this disease can be used in the acute phase without oozing glycerite lotion, oozing can be used externally 3% boric acid solution. Can also use topical glucocorticoids (hydrocortisone, etc.), combined with the infection of topical antibiotic ointment (mupirocin ointment, etc.) to reduce inflammation. 2. Atopic dermatitis: the treatment of this disease is mostly used topical drugs (such as glucocorticoids, calcium-modulated neural phosphatase inhibitors, antibiotic ointment), severe cases can be orally administered drugs (antihistamines such as loratadine, roxithromycin and other antibiotics, cyclosporine and other immunosuppressant drugs), physical therapy (eg, ultraviolet light, etc.). 3. Seborrheic dermatitis: this disease requires daily care (regular work and rest, limit high sugar and high fat diet, avoid spicy food, avoid excessive cleaning and friction, etc.), and with the topical medication (glucocorticoid drugs, calcium-regulated phosphatase inhibitors, etc., fungal infections need to choose the antifungal preparations). 4. Neurodermatitis: patients can take oral medications (such as loratadine and other antihistamines) to relieve itching symptoms, symptoms of neurasthenia and itching is intense, need to use sedatives under the guidance of a doctor (such as diazepam); large areas of inflammation can be used topical glucocorticoids or calcium-modulated phosphatase inhibitors. It is recommended that the patient consult a doctor in a timely manner to determine the cause of the disease and receive targeted treatment as prescribed by the doctor.