1. What is excessive blood lead in children? Excessive blood lead in children means that the lead content in a child\’s body exceeds the safety standard, causing adverse reactions in the body. Lead is a toxic metal and long-term exposure can have serious effects on human health, especially for children. 2. What are the causes of excessive blood lead in children? 1. Environmental pollution: There are a large number of lead-containing substances in the environment, such as gasoline, paint, water pipes, etc. If left unused for a long time