Lead exposure occurs when individuals come into contact with lead, a toxic metal that can harm health. Common sources include old paint, contaminated soil, plumbing pipes, and certain imported toys. Even small amounts of lead can be dangerous, especially for children, as it can affect their development and learning abilities. Symptoms of lead exposure may include headaches, abdominal pain, and fatigue. Long-term exposure can lead to more severe health issues, such as lead poisoning, which can cause neurological damage and other serious conditions. It is important to identify and reduce lead sources to protect public health, particularly in vulnerable populations like children and pregnant women.