There are many organs under the right rib cage, such as the liver, gallbladder, common bile duct, part of the colon, and also the duodenum. If the right subcostal area is posteriorly and laterally, this may be the location of the kidneys and ureters. If there is significant discomfort under the right rib cage, you need to go to the hospital as soon as possible to complete relevant tests, such as routine blood, C-reactive protein, liver function, and also tumor markers, hepatitis B five, infection four, etc. At the same time, imaging examinations, such as abdominal ultrasound, abdominal CT, abdominal MRI, etc., are also needed, and some patients also need to undergo enhancement scan or imaging examination. If malignant tumor is considered to be the cause, PET-CT is sometimes needed to help clarify whether there is extensive metastasis of the tumor. During the examination, patients should not drink drinks containing alcohol and should not eat spicy food.