The size of the normal human liver is measured by ultrasound. Under normal circumstances, the maximum oblique diameter of the right liver does not exceed 14 cm and the anterior-posterior diameter of the right lobe of the liver does not exceed 10 cm. For the left liver, the thickness of the left liver is usually no more than 6 cm and the length is usually less than 9 cm, and the length and thickness of the caudate lobe of the liver do not exceed 4.5 cm. In normal people, the liver is mostly not palpable under the rib cage. If an enlarged liver is palpated under the rib cage it mostly suggests the possibility of liver enlargement, such as if the patient has liver stasis or due to other diseases of the liver, such as the acute phase of hepatitis, which can cause further enlargement of the liver. After this causes tension in the liver envelope, the patient will have vague pain and discomfort in the right upper abdomen and the back as well as swelling and pain. At this time, the patient should have a CT or MRI of the upper abdomen to see if there is any occupational disease in the liver and to draw blood to check for viral hepatitis and other diseases of the liver.