Whether or not you can do liver function after drinking water in the morning needs to be determined according to the situation, a small amount of water does not affect the test, but if a large amount of water can not do liver function. Generally liver function tests need to fasting blood draw, in the 8~12 hours before the test need to fasting and water, drink a small amount of water on the gastrointestinal absorption is not very big, but if the liver function test before drinking a lot of water may make the blood is diluted, which will affect the correctness of the results of the liver function test. Eating high-fat food, staying up late, strenuous exercise, overwork and smoking and drinking the day before the liver function test may affect the accuracy of the test results. If the results of liver function tests are abnormal, you need to go to the hospital as soon as possible, and the doctor will formulate an individualized diagnosis and treatment plan according to your specific condition, so as to avoid delaying your condition.