The jaw consists of two bones, the maxilla, or upper jaw, and mandible, or lower jaw. Pain in the lower jaw can occur from many different causes, and can be acute or chronic. Pain may also occur from conditions in the jaw bone itself or may be "referred" pain from problems in nearby regions, such as the mouth or neck.

A hiatal hernia occurs when a portion of your stomach pushes up through your diaphragm's small opening, the hiatus, which is responsible for allowing the esophagus to pass through to the stomach. When a hiatal hernia occurs, the hiatus cannot close properly and stomach acid travels back to the esophagus.

Chocolate does not directly cause diarrhea, but compounds found in chocolate foods such as lactose and artificial fats and sweeteners can cause discomfort.

Diverticular disease includes two phases: a chronic phase known as diverticulosis and an acute component called diverticulitis. Health care professionals recommend a specific two-phase diet during flare-ups of diverticulitis.

Nearly everyone has overindulged in good food at least once and has experienced the resulting abdominal discomfort. The pain, gas, indigestion and other symptoms often experienced after overeating can also impair your ability to focus on your work and other everyday tasks.

Peptic ulcers are open sores inside the stomach, esophagus or intestine which may bleed and cause health complications. Your physician may adjust your diet as part of your treatment for a bleeding ulcer in addition to medication use. Spicy foods, alcohol and caffeinated products may make ulcers worse.

Gastritis is an inflammation of the stomach lining, characterized by a burning sensation or dull pain in the upper area of your abdomen. Gastritis symptoms can include indigestion-like pain, bloating, nausea and vomiting. Reducing the amount of acid in your stomach allows the tissues to heal without further irritation.

Viral gastroenteritis, commonly known as a stomach virus, is a very uncomfortable illness that most people experience at some point in their lifetime. It is highly contagious and can be acquired from contaminated food, poor sanitation or contact with an infected individual.

Crohn's and ulcerative colitis are inflammatory bowel diseases (IBDs) that cause inflammation of the gastrointestinal tract. According to the Mayo Clinic, both Crohn’s and ulcerative colitis cause severe abdominal pain and diarrhea. They can even lead to malnutrition.

Abdominal hernias usually occur when there is a weakening or defect in the muscles and tissues of the abdominal wall. When strain is placed on the abdominal wall, part of the intestines can break through the weakening wall, causing a mass to protrude from the abdomen.

Gas and bloating can be two embarrassing health concerns, but they don’t necessarily indicate a problem with your digestive tract. They are typically caused by your dietary and eating habits.

Severe abdominal pain after eating is not normal and may be due to a number of disorders. Peptic ulcer disease, gallstones and mesenteric ischemia are among the most common causes.