It is also important to consider the presence or absence of accompanying medical issues in order to precisely identify the cause and to help formulate the optimal treatment for pain in the buttocks.
The abdominal cavity contains the stomach, intestines, liver, gallbladder, kidneys, spleen and pancreas. Side pain can be a symptom of a wide variety of mild to serious diseases, disorders and conditions, such as infection, infarction, inflammation, indigestion, trauma, intestinal obstruction, and cancer.
The second cause of side stitch is probably the most common. It's a stretching of the ligaments attached to the liver, pancreas, stomach, and intestines. These ligaments are put under stress when you walk vigorously. The bouncing action causes them to stretch, thereby causing pain.