Repeated dandruff on the head of newborns is considered to be seborrheic dermatitis, psoriasis vulgaris or eczema and other skin diseases. 1. Seborrheic dermatitis: It may be caused by improper parental care or improper maternal diet during breastfeeding, etc. It may appear as crusts and scales on the head and face. 2. Psoriasis vulgaris: psoriasis-like rash can appear in the diaper area of infants, but sometimes the lesions can diffusely cover the scalp, which can occur in infants aged 1 to 2 weeks or 8 to 9 months, and the lesions are round and ovoid plaques with silvery-white scales on the surface. 3. Eczema: Inflammatory diseases of the skin caused by contact with substances, inhalation of substances, etc., the scalp and face and other parts of the scalp can appear red, flaky or have a rash. Newborns repeatedly dandruff on the head, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.