The symptoms of duodenitis, the inflammation of the upper small intestine that is adjacent to the stomach are similar to that of gastritis, but the pain can also be experienced in the upper right side under the ribs.
Some conditions can cause pain in any location of your lower abdomen, or cause pain in the entire area. These include endometriosis, PID, IBD, and intestinal obstruction.
Please keep in mind that the information included in this article is just a general guide to abdominal pain and isn’t a diagnosis. If you feel pain in your belly that is strong, persistent, and/or interferes with your daily life we highly recommend you talk to your doctor, who will be able to make a proper diagnosis.