The causes of red spots on the back of the head of newborns mainly include eczema and hemangioma, as follows: 1, caused by eczema, if the newborn belongs to allergic constitution, will be allergic to milk, protein or other foods. This will lead to eczema on the head and face, and newborns often have eczema on the head and the back of the head, which will show up as erythema on the back of the head, which can be applied with topical glucocorticoid ointment. This can be treated with propranolol, and if the treatment is not effective, surgical laser treatment should be performed in time.