There are many causes of pain in the right lateral region, and the common causes of pain are as follows: First, it may be caused by a rib fracture. If it is caused by a rib fracture, the pain will be more intense and accompanied by symptoms of restricted movement. It is necessary to go to the hospital as soon as possible to take a film to check the fracture and then choose external fixation treatment or surgery. Second, it may be caused by inflammation of the ribs, which is usually accompanied by fever and local redness, swelling, heat and pain. It can be treated by corresponding anti-inflammatory, anti-inflammatory and anti-infective treatments. Finally, it may be caused by a tumor. If it is caused by a tumor, it is usually accompanied by unexplained weight loss and mental fatigue, in addition to painful symptoms. It is necessary to take blood and film examination as soon as possible, and then choose surgery or radiotherapy or chemotherapy after investigation.