Possible manifestations of liver dysfunction include gastrointestinal symptoms, dark complexion, jaundice, endocrine disorders, bleeding tendency and so on. 1. Digestive related symptoms: Liver insufficiency will seriously affect the function of the digestive system and cause a series of symptoms, such as loss of appetite, nausea and vomiting, anorexia, bloating and diarrhea. 2. Dark complexion: When liver insufficiency decreases cholesterol synthesis, adrenocorticotropic hormone synthesis is insufficient, which feedback stimulates melanin production to increase, causing skin pigmentation, manifesting as dark complexion. 3. Jaundice: liver is an important place for bilirubin metabolism, when liver insufficiency, bilirubin metabolism is disturbed, and the increase of blood bilirubin level can cause jaundice, which is manifested as yellowing of skin and mucous membranes all over the body, and deepening of urine color. 4. Endocrine disorders: liver is the place of inactivation of many hormones, when liver insufficiency reduces the inactivation of various hormones, it will cause endocrine disorders, which will be manifested as gynecomastia, infertility, menstrual disorders and amenorrhea in women. 5. Bleeding tendency: liver is the place for synthesizing coagulation factors, when liver insufficiency reduces the synthesis of some coagulation factors, resulting in bleeding tendency, such as nosebleed, oral mucous membrane bleeding, skin ecchymosis and so on. Patients with the above symptoms should be suspected of abnormal liver function, and it is recommended to go to the hospital as soon as possible for further examination, such as liver and kidney function tests, abdominal ultrasound or CT, etc., so as to clarify the cause in time and provide targeted treatment.