Health check is very important for human body. Through health check, some diseases can be diagnosed at an early stage and clinical treatment can be guided to prevent further aggravation of the disease. Before the health examination, you should pay attention to: try not to eat spicy and stimulating food in the first three days, do not eat too greasy food, such as fatty meat, fried food, etc. In addition, do not drink alcohol, because these may affect the results of the examination. Before the examination, you should pay attention not to stay up late and take rest. You should fast and restrict water for 6-8 hours, and have a physical examination on an empty stomach, because if you eat or drink before the examination, it may affect the abdominal ultrasound examination and the liver function examination. Try not to take drugs before the health check, especially those that may affect liver and kidney function, so as not to affect the results of the examination. However, if you are suffering from chronic diseases such as hypertension and need to take medication on time, you should take medication according to the patient’s condition to avoid aggravation or adverse reactions.