What causes hair loss in a 12-year-old child?

The cause of hair loss in children may be trace element deficiency, calcium deficiency, hypothyroidism, hypothyroidism, etc. Fungal infection can also cause hair loss. It is recommended to take the child to the dermatology examination, if it is caused by fungal infection, need to be treated with antifungal drugs under the guidance of a doctor, usually to keep the scalp clean.