Children’s hair loss may be caused by bad habits, but also may be triggered by malnutrition, calcium deficiency and other factors. 1. Bad habits, children’s hair loss may be due to frequent shampooing or long time not shampooing scalp metabolism abnormality, so this symptom will appear. 2. Malnutrition, if the children’s body nutrient deficiency, may affect the growth and development of hair, hair thinning, pale and other symptoms. 3. Calcium deficiency, if the children’s body lacks calcium, may lead to the nervous system excitability, but also appear skin sensory abnormalities, hair loss, restless sleep and other symptoms. There may be other reasons for children’s hair loss, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.