Lead is a toxic heavy metal that is very harmful to the human body. If parents suspect that their child has a high level of lead in the body, they need to go to the hospital to have the blood lead level tested. If a child’s blood lead level is >100μg/L, it is necessary to consider that the child has lead overload. When a child has high lead level, several body systems can show abnormal symptoms: 1. nervous system: dizziness and irritability, learning difficulties, inattention, decreased intelligence, hyperactivity, movement disorders, etc.; 2. digestive system: abdominal pain, diarrhea, nausea, vomiting and other uncomfortable symptoms, vomit may have milk-white lumps; 3. cardiovascular system: the child may have increased blood pressure, arrhythmia, etc.; 4. Other symptoms: In severe cases, children’s eyesight and hearing are damaged, and some children even have personality changes, showing easily provocative and aggressive behaviors. If your child is diagnosed with high blood lead, you should start with diet and living habits to reduce the intake of lead. In terms of diet, we should pay attention to not allowing children to consume foods that may contain lead such as leather eggs, canned food and popcorn, and eat more fresh vegetables and fruits such as celery and apples; toys and supplies that children play with should be washed frequently, and do not take children to walk or play near lead working factories. In addition, homes that use coal as fuel should open windows frequently to ventilate, and at the same time, try to avoid children’s passive smoking and stay away from crowded people and car exhaust.