Sudden nausea, vomiting and sweating may be related to food poisoning, gastroenteritis or hypoglycemia, vertigo attacks. 1. Food poisoning: due to the consumption of food contaminated by bacteria and toxins, patients may experience abdominal pain, diarrhea, dizziness, nausea and other symptoms, and other people eating with similar signs and symptoms should be highly suspicious of the possibility of this disease. 2. Acute gastroenteritis: mostly associated with bacterial or viral infections induced by unclean diet, patients may also experience nausea, vomiting, abdominal distension, abdominal pain and other symptoms. Mild patients can rest in bed, appropriate supplementation of sugar and saline to avoid dehydration; severe symptoms or persistent unrelieved, give anti-infective, antiemetic, antidiarrheal, supplemental intestinal probiotics and other treatments. 3. Hypoglycemia: mainly manifested as panic, shivering, dizziness, blurred vision, sweating, hunger, weakness of limbs, etc., patients should supplement food and glucose in a timely manner, and be alert to the occurrence of hypoglycemic coma and other situations. 4. Vertigo attack: Vertigo patients can appear when the attack of visual rotation symptoms, can also be accompanied by nausea, vomiting, sweating and pallor and other symptoms, the symptoms can disappear after rest. Of course, the above symptoms may also be caused by other reasons, if the persistence of unrelieved or significantly aggravated, it is recommended to consult a doctor in time to identify the cause of the disease, and to carry out targeted treatment.