Cold sweat on the forehead may be associated with infectious diseases, cardiovascular system diseases, hypoglycemia and so on. 1. Infectious diseases: patients with infectious diseases of the digestive system (such as gastrointestinal inflammation, acute appendicitis, pancreatitis, etc.), infectious diseases of the respiratory system (viral colds, etc.), etc. will have a cold sweat on the forehead as a precursor symptom; digestive diseases are often accompanied by nausea, vomiting, abdominal pain and other symptoms; respiratory diseases will be followed by patients with chills, fever and other symptoms 2. Cardiovascular diseases: such as angina pectoris or acute myocardial infarction, due to pain can have cold sweat on the forehead, anterior region of the heart suffocation or severe pain, nausea, pallor and other symptoms. 3. Hypoglycemia: patients with excessive dieting, diabetes medication irregularities, etc., will suddenly hypoglycemia, showing cold sweat on the forehead, headache and other symptoms. It is recommended that patients with severe symptoms immediately go to the emergency department of the local hospital for a more comprehensive physical examination, and receive active treatment after clarifying the cause of the disease.