Gray hair in children may be related to nutritional deficiency, poor sleep quality, heredity, acquired diseases and other conditions. 1. Nutritional element deficiency: the lack of nutrients in the body due to picky eating and partiality, usually seen in zinc deficiency or copper deficiency of children prone to gray hair. 2. Poor sleep quality: Children who have poor sleep quality or often sleep late or have insomnia can also develop gray hair. 3. Heredity: Children who have gray hair when they were young within three generations of their family may also have gray hair. 4. Acquired diseases: hyperthyroidism, or the presence of syphilis and other specific diseases, these diseases can also interfere with the endocrine metabolism of the child’s body, leading to the phenomenon of children with gray hair. Children with gray hair may also have 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.