Trace element measurements are useful for checking calcium, iron, zinc, selenium, etc., which can be used to assess the presence of trace element deficiencies or excesses. Calcium deficiency can be measured by trace elements. Children may exhibit crying, waking up easily, episodic abdominal pain, diarrhea, and cramps, as well as X-legs, O-legs, and chicken breasts, which can be detected by trace elements, and can be treated with exogenous calcium supplements, such as calcium gluconate. Zinc deficiency can also be detected by trace elements. Zinc deficiency can manifest as loss of appetite, dermatitis, hypogonadism, enteropathic limb dermatitis, and immunocompromise. Nutritional zinc deficiencies can be treated with divalent zinc agents, such as zinc gluconate oral solution. Selenium deficiency is a risk factor for Creutzfeldt-Jakob disease, but excessive selenium can cause toxicity, manifested by hair loss, brittle nails, and neurological abnormalities, and once abnormalities are detected, trace element testing should be performed in a timely manner. Trace element test can use blood, hair, once found indicators of abnormal, should be timely under the guidance of the doctor standardized medication treatment.