Excessive manganese in stainless steel may have no effect on the human body, or it may lead to dizziness, limb weakness, sleep disorders, and in severe cases, neurological disorders such as finger tremors and increased muscle tone. According to the manganese intake, intake time and other analysis. 1. No harm: the use of stainless steel time is short, and manganese exceeds the index is low, trace manganese generally does not harm the human body. And manganese is one of the essential trace elements, people need to intake 5-10mg manganese every day. So when the intake is small and short, it is generally not harmful. 2. Manganese poisoning: Stainless steel manganese index exceeds the standard seriously, and the patient intake time is long, it will cause chronic manganese poisoning. In the early stage, there are symptoms such as dizziness, palpitation, limb weakness, excessive sweating, etc. With the deepening of poisoning, memory loss, sleep disorders, etc., the condition gradually aggravated, there will be a finger tremor, increased muscle tone and other autonomic dysfunction. In the late stage, there are mental symptoms such as emotional indifference and schizophrenia. It is suggested that patients should go to regular hospitals for blood and trace element examination, so as to clarify whether manganese poisoning is present at an early stage and treat it as early as possible. In normal times, patients should pay attention to the relevant protective measures to avoid being in the environment with high manganese content, which may cause irreversible damage to the organism.