A physical examination of the liver in a normal person including blood biochemistry (aminotransferases, bilirubin, albumin, prothrombinogen), AFP, and ultrasound is sufficient. The frequency is once a year. In addition to the above tests, patients with fatty liver should also check their blood lipids and blood glucose. Color ultrasound, if suggestive of increased point density, need to do further CT, MRI. The frequency is once every nine months. Hepatitis B patients should check biochemistry complete set, alpha-fetoprotein, need to add HBV-DNA. frequency is every six months. If you find a space or nodule on the liver, CT and MRI can not figure out the nature, then you need to review the observation period every three months. Two consecutive retests. If the results are the same three times, you can review it once every six months in the future. There are also some precautions to observe before the physical examination: 1, don’t eat too greasy and don’t drink alcohol two or three days before the liver function test. 2, before the physical examination to ensure adequate sleep, avoid exertion, excessive exercise. 3, liver function tests and do abdominal ultrasound before fasting. ultrasound through the echo to determine the condition of the organs, and the echo is most likely to be affected by the gas deviation. Eating will swallow a lot of gas, which will easily lead to obvious intestinal flatulence. 4, colds, infusion period to avoid doing the test; three days before the blood draw should stop taking drugs that affect the results of liver function test, such as isoniazid, rifampicin, chlorpromazine, salicylic acid preparations. Many young people get the physical examination report, found that the results are normal, that there is no problem with the body, the report will be thrown aside, this practice is not desirable. In fact, it is necessary to keep and collect the results of each physical examination into a health file. First, from the relatively abnormal values, you can dynamically observe what changes have occurred. Secondly, if it is necessary to change the physical examination organization, the previous information can be provided to the new physical examination organization, which can help the examining doctor to make a more accurate determination. Furthermore, people are always going to be sick, and no matter how many times they have been normal before, there will always be a time when there is an abnormality, and if you can compare it with the previous results, it will be very valuable to the doctor’s diagnosis and treatment.