Erythema papulosum is usually two of the more common skin manifestations that appear as red patches and smaller bumps on the skin surface, mostly seen in eczema caused by skin allergies, but may also be associated with some skin diseases such as hand, foot and mouth disease, chicken pox and measles, etc. They occur for a variety of reasons, so topical symptomatic treatment is usually chosen. Most erythema and papules are not serious diseases and do not need to be overly worried. First of all, you need to stay away from dust mites, pollen, cat and dog hair and other allergens, clean the room regularly, keep the air circulating, and try not to touch perfumes, disinfectants, detergents, antiseptics and other irritants directly. Secondly, under the guidance of a doctor, you can take medication and apply topical anti-inflammatory and anti-itch creams, such as hydrocortisone butyrate cream and dinaide cream. If the condition is serious, oral medication can be administered under the guidance of a doctor. During the treatment period, skin care should be strengthened. Take a warm bath and pay attention to the water temperature not to be too high. When cleaning the body or hair, choose a neutral or hypoallergenic body wash, do not use alkaline soap to avoid irritating the skin, and put on a more moisturizing lotion before the moisture on the body is fully dried, which can moisturize and help form a skin barrier. Try to wear cotton breathable clothes and change them regularly.