There are many possible causes of nausea and weakness, first of all, consider whether it is heat stroke caused by a hot environment, digestive diseases such as chronic gastritis or gastric ulcer, liver disease, gallbladder disease, etc. Secondly, if a woman of childbearing age should also consider the possibility of pregnancy. In addition to the toxic effects of food, hypertension, diabetes or brain lesions may also lead to nausea and weakness and other symptoms: 1. Stomach diseases: gastritis, gastric ulcer due to gastric mucosal damage leads to nausea and weakness usually accompanied by belching, taking antacid drugs such as omeprazole symptoms can be slow. In addition, indigestion and acute gastroenteritis and other diseases can also lead to the above-mentioned situation; 2, liver disease: hepatitis or cirrhosis patients with impaired liver function and thus affect metabolism, can lead to nausea and vomiting, nutrient absorption decline often leads to weakness and other discomfort; 3, gallbladder disease: gallstones or cholecystitis attack caused by indigestion, can lead to nausea and vomiting and weakness and other symptoms, accompanied by gallbladder pressure pain 4, toxic effects: food poisoning or consumption of some of the toxic effects of wild mushrooms may also cause nausea and vomiting and weakness symptoms; 5, endocrine system diseases: such as diabetes mellitus, the onset of early symptoms of transient hypoglycemia, such as nausea, dizziness, panic and weakness of the limbs; 6, cardiovascular lesions: some brain lesions such as viral encephalitis, septic meningitis or cerebral edema and other brain lesions It can also cause nausea and vomiting or even jet-like vomiting, weakness, usually accompanied by fever, poor consciousness and other symptoms. Patients with hypertension may experience a large increase in blood pressure within a short period of time, which can lead to cerebral vasospasm, resulting in nausea, vomiting, weakness of the limbs, and dizziness and headache.