Normal liver function tests and normal color ultrasound can rule out most liver diseases, but some chronic hepatitis diseases cannot be determined by liver function tests and color ultrasound, such as hepatitis B, hepatitis C and so on. Normal liver function and normal color ultrasound does not mean that the liver must be normal. Clinically, there are also some liver diseases that cannot be detected by liver function and color ultrasound of liver and gallbladder, such as hepatitis B and hepatitis C caused by viral infections, etc. When the patients do not have obvious abnormal lesions, often the liver function and color ultrasound are normal. Therefore, if you want to thoroughly investigate liver diseases, in addition to the basic liver function tests and liver and gallbladder ultrasound, you also need to carry out hepatitis virus, alpha-fetoprotein test, hepatitis B five and hepatitis B DNA, etc., which is especially important for hepatitis B carriers. Therefore, if you want to thoroughly check your liver disease, it is recommended to go to a regular hospital and under the guidance of a doctor for a detailed examination.