Sudden pain in the right lower ribs may be due to cholecystitis, trauma or intercostal neuritis. 1. Cholecystitis: the gallbladder is located in the right side of the lower ribs, cholecystitis acute attack will cause the area suddenly obvious colic, some patients will be accompanied by pain radiating to the back of the right shoulder, this disease usually occurs at night or after eating a lot of fat. 2. Trauma: pain in the right lower ribs, which may be caused by soft tissue injury or rib fracture due to inadvertent collision or extrusion, usually accompanied by obvious local redness and swelling. 3. Intercostal neuritis: intercostal neuritis belongs to the aseptic inflammation of the nerves of the ribs, this disease will lead to pain in the rib area of the patient, the patient to change position or coughing, sneezing, deep breathing, which will lead to pain aggravation. There may be other reasons for the presence of pain in the lower right side of the ribs, which should be promptly examined and treated in the hospital.