Diabetes and mercury poisoning are generally not related, diabetic patients with mercury poisoning may be exposed to mercury-containing substances in daily life, and it is recommended to seek medical attention in a timely manner. Mercury poisoning is mainly caused by long-term inhalation of mercury vapor or mercury compound dust in production, mostly chronic poisoning, with psychoneurological abnormalities, stomatitis, tremor as the main symptoms, and can involve the respiratory tract, gastrointestinal tract, kidneys. Acute poisoning occurs when large doses of mercury vapor are inhaled or mercury compounds are ingested. Poisoning can also be caused by applying mercury preparations to broken or ulcerated areas of the skin. Occupational mercury poisoning is common in the production process of mercury mining, amalgam smelting, gold and silver extraction, vacuum mercury lamps, meters, thermometers, dental fillings, pigments, pharmaceuticals, etc. Lifelong mercury poisoning can be seen in the use of skin whitening cosmetics, hair dyes, or accidental intake of mercury-containing substances in daily life. Short-term inhalation of high concentration of mercury vapor, initially only a metallic taste in the mouth, followed by dizziness, headache, nausea, vomiting, abdominal pain, diarrhea, fatigue, general body aches and pains, chills, fever, quite similar to metal fume fever, accompanied by skin rashes. The respiratory system presents with coughing, coughing up sputum, chest pain, dyspnea and cyanosis. When the above symptoms occur, it is recommended to consult a doctor in time, follow the doctor’s instructions to carry out relevant examinations, clarify the cause with the help of the doctor, and carry out targeted treatment or therapy.