If the lower left side of the rib cage is likely to be a problem of the gastrointestinal tract, common is gastric mucosa damage, chronic gastritis, etc., you can choose those drugs that can inhibit the secretion of gastric acid to protect the gastric mucosa, and have a pain-relieving effect. If the pain is on the right side of the lower edge of the rib cage, it belongs to the liver and gallbladder, you can do an ultrasound examination to see if there is cholecystitis, if it is determined that the pain is caused by cholecystitis, you can eat anti-inflammatory and biliary drugs to treat. You should pay attention to a light diet, do not eat too greasy, poorly digested food. But the specific treatment plan needs to be judged by a professional doctor.