The newborn’s buttocks red and broken skin may be dermatitis, eczema and other diseases caused by the use of glucocorticoids and other drugs. 1. Dermatitis: If it is caused by dermatitis, newborns can be treated with glucocorticoid medications such as prednisone and budesonide ointment under the guidance of a doctor, which can help to eliminate the inflammation and reduce the irritation of the skin area. 2. Eczema: If it is caused by eczema, newborns can be treated with mupirocin ointment under doctor’s supervision, which helps to improve the allergic reaction and reduce the irritation of the buttocks skin. After the newborn’s buttocks are red and broken skin, you should go to the hospital in time, choose the appropriate method of treatment, which helps to reduce the irritation of the body.