Yellow crusty stuff on the forehead in infants is usually considered to be seborrheic dermatitis. Infantile seborrheic dermatitis often occurs in areas with dense sebaceous glands, such as the scalp, forehead, and between the eyebrows, and usually appears as red patches with a yellow greasy scaly surface. Most infants do not experience pain or discomfort. Bacteria, vitamin deficiencies, and seborrhea are usually thought to be the main causes of seborrheic dermatitis in infants. If an infant has few yellow crusts on the forehead, there is no need to be nervous, and there are no specific symptoms or redness that need to be treated. If the scabs are particularly thick and more, you can choose vegetable oil, emollient oil, etc., applied to the scabs, to be softened scabs, you can slowly clean, do not use your hands to forcefully scratch. At the same time, pay attention to the scalp cleaning action to be gentle, do not rub the skin. In addition, the head should be rinsed clean after bathing, and the skin should be cleaned and cared for in general. If the baby is breastfed, the mother try to eat light, do not eat spicy, stimulating, greasy food, should eat more fresh vegetables and fruits. If the symptoms of yellow crusts on the forehead of infants are serious, or the symptoms persist and have not improved, they should go to the hospital for treatment.