Symptoms of lead poisoning include loss of appetite, slow reaction, poor concentration and so on. 1. Loss of appetite: Many patients’ digestive system is affected by lead poisoning, which is manifested as anorexia, patients have no appetite for food, and constipation and other symptoms. 2. Slow reaction: after lead poisoning, the synthesis of vitamin D in the patient’s body is affected, which may affect the absorption of calcium, so there will be developmental delays, and it may also have an impact on the patient’s intelligence. 3. Lack of concentration: It is difficult for patients to concentrate after lead poisoning. For example, many children may have behaviors such as not listening attentively and moving around in the classroom after they have mistakenly consumed lead elements. There is also the possibility of temper, impulsiveness and other manifestations. It is recommended that patients should seek medical treatment in a timely manner after the symptoms of suspected lead poisoning, and carry out standardized lead expulsion treatment under the guidance of the doctor after a clear diagnosis is made.