The possible clinical causes of blood crusts on the navel include improper scratching, neonatal umbilical cord infection, neonatal hemorrhagic disease, etc. 1. Inappropriate scratching: some people scratch the skin of the navel area persistently, which may cause local skin damage, congestion, edema and oozing, and also cause local infection. Clinical manifestations include itching, pain and the formation of bloody scabs. This condition requires sterilization and avoidance of inappropriate scratching habits. 2. Neonatal Umbilical Cord Infection: When a newborn cuts the umbilical cord after birth without disinfecting it in a timely manner, the skin around the umbilicus may become infected with redness, swelling, pus, and bleeding scabs, etc., which requires the use of topical antibiotics such as erythromycin ointment under the guidance of a doctor for treatment. 3. Neonatal hemorrhagic disease: If the child in the pregnancy intake of nutritional deficiencies, the body lacks vitamin K will cause the whole body with bleeding, the navel due to the umbilical cord cut wounds did not heal and a small amount of blood, but also the formation of blood crusts. In the first case, it is recommended that the wound be sterilized to avoid infection; in the latter two cases, it is recommended that effective care be taken under medical supervision.