Lead poisoning or toxicity most commonly occurs over time. The ingested amount of lead is not cleared from the body and accumulates. The lead causes anemia, decreased IQ, abdominal pain, constipation, and kidney damage. Children are more susceptible, and exposure is often from old peeling paint. Other types of exposure are from hobbies and toys. In adults, exposure may occur among those who hunt with lead bullets or use them regularly at a firing range.