There are many possible symptoms of lead poisoning. Lead can affect many different parts of the body. Over time, even low levels of lead exposure can harm a child's mental development. The possible health problems get worse as the level of lead in the blood gets higher.

Possible complications include:

• Reduced IQ
• Slowed body growth
• Hearing problems
• Behavior or attention problems
• Failure at school
• Kidney damage

The symptoms of lead poisoning may include:

• Irritability
• Aggressive behavior
• Low appetite and energy
• Difficulty sleeping
• Headaches
• Reduced sensations
• Loss of previous developmental skills (in young children)
• Anemia
• Constipation
• Abdominal pain and cramping (usually the first sign of a high, toxic dose of lead poison)
• Very high levels may cause vomiting, staggering gait, muscle weakness, seizures, or coma