Sometimes it can affect the nervous, digestive and endocrine systems, etc., and can lead to death in serious cases. 1, affect the nervous system: common are memory loss, mental retardation, drowsiness, unresponsiveness, hyperacusis, dizziness, headache, tinnitus, deafness, nystagmus, ataxia, dull tendon reflexes, etc. In heavy cases, dementia, wood stiffness can occur, and in severe cases, it can lead to lethargy. 2. Endocrine system: some women may experience menstrual disorders and even infertility; men may experience impotence, premature ejaculation, loss of libido, lactation and other symptoms. 3. In more serious cases, it can cause certain harm to the heart, leading to mucus edema of the heart muscle, resulting in pericardial effusion and thus causing heart failure. 4, digestive system: can appear abdominal distension, loss of appetite, constipation and other symptoms. Sometimes paralytic intestinal obstruction can also occur. Sometimes it can also lead to anemia. 5.Sometimes it can also lead to hypothyroidism, which can lead to slower reaction, slower basal metabolic rate, sluggish gaze, fatness, abnormal blood lipids and other symptoms. 6. For women of childbearing age, it may cause symptoms such as miscarriage and abnormal fetal development. The above symptoms should be treated promptly to avoid serious consequences.