Symptoms of lead poisoning and of other heavy metals are: diminished mental and physical abilities and high blood pressure. Personality changes include aggression, irritability and impatience. Other symptoms are, but not limited to, weight loss, nausea, headache, severe abdominal cramping, gastrointestinal dysfunction, constipation, anemia, nervous system disturbances, dehydration, flu symptoms, insomnia, nephritis, renal diseases, gall bladder problems, carpal tunnel syndrome symptoms and acute intermittent porphyria. symptoms. Symptoms in children are, but not limited to, premature birth, low birth weight, long term behavioral and learning problems, hearing loss, developmental delays, hyperactivity, mental retardation, blood formation impairment, metabolism impairment, and nerve damage. Severe heavy metal poisoning may cause kidney damage, brain damage, irreversible retardation, convulsion and even death.