Heavy metal poisoning generally requires physical examination; laboratory examination; imaging examination; lead and mercury expulsion test; electroencephalography, etc. 1. Physical Examination: The abdomen can be examined by percussion to see if there is percussion pain in the liver and kidney area; the eyes can be examined, if brown light reflection is found in the anterior chamber of the crystalline lens of the eye, it may suggest mercury poisoning; check the fingernails, if the fingernails are thick, brittle and dull in luster, it may suggest arsenic poisoning. 2. Laboratory examination: the heavy metal content in hair, blood, urine and liver and kidney function can be detected to determine whether there is heavy metal poisoning, and the main test items include routine blood test, liver and kidney function test, urine heavy metal content test, blood heavy metal content test, hair heavy metal content test, erythrocyte zinc protoporphyrin test and so on. 3. Imaging test: Chest X-ray can be used to check the status of both lungs and to clarify whether manganese compounds and dust are inhaled. 4. Lead and mercury repellent test: These two tests can be used to find out whether there is excessive lead or mercury in the body. 5. Electroencephalography (EEG): Some heavy metals can affect the neural activity of the brain, and this program can help to find out whether the rhythm of the brain waves is normal or not. If symptoms of heavy metal poisoning appear, you should go to the hospital in time for testing to clarify the type of poison and carry out targeted treatment as soon as possible to prevent toxicity from being deposited and causing danger.