Normal liver function and ultrasound but vague pain in liver area is considered to be caused by abnormal test results, costochondritis, rib fracture, pleurisy, pneumothorax and other diseases. 1. Abnormal test results: some people take special drugs before the test, eat or do not actively cooperate with the doctor during the test, improper operation of the examiner, etc., which can lead to the phenomenon of normal liver function and ultrasound, but vague pain in the liver area. 2. Costochondritis: the disease may be related to infection, chronic strain and so on. Patients with costochondritis mainly show pain in the chest area, and the pain can be radiated to the back or abdomen, and some of them will mistake it for vague pain in the liver area, so the liver function and ultrasound are normal. 3. Rib fracture: mostly due to trauma, tumor metastasis and other factors. Patients mainly manifest chest pain, chest deformity, etc. Some patients may have normal liver function and ultrasound, but mistake it for vague pain in liver area. 4. Pleurisy: the disease can also cause some patients with normal liver function and ultrasound, but hidden pain in liver area. Pleurisy is related to infections, malignant tumors, etc. Typical symptoms of patients include chest pain, chest tightness, fever, and body weakness. 5. Pneumothorax: Pneumothorax is related to chest injury, underlying lung disease, etc. It can be manifested as normal liver function and ultrasound but vague pain in liver area. Pneumothorax patients are easily accompanied by irritating cough, dyspnea, chest tightness and other uncomfortable symptoms. There are many causes of normal liver function and ultrasound but vague pain in liver area, such as tuberculous pleurisy, intercostal neuralgia, pulmonary embolism, bronchopulmonary carcinoma and so on. It is recommended that patients seek medical examination in time in order to clarify the disease and then follow the doctor’s instructions for treatment.