Middle Upper Abdominal Pain. The most common causes of pain in the pit of your stomach are peptic ulcer disease, acid reflux and gastritis, or inflammation of the stomach lining. If your pain is worse when your stomach is empty and abates when you eat, you may have an ulcer.
http://livehealthy.chron.com/could-cause-upper-stomach-pain-1889.html
Millions of people around the world have lactose intolerance. In fact, in some areas of the world, the lactose intolerant outnumber those who can digest lactose, a sugar found in milk and milk products. This type of food intolerance causes milder abdominal pain, bloating, diarrhea, burping, gas, and indigestion.
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Food poisoning from viruses or bacteria can cause abdominal pain, along with diarrhea and vomiting. Many outbreaks of food poisoning have been seen in recent years in the U.S., including 20 people in 7 states who picked up Salmonella from contaminated beef in 2011. In rare cases, food poisoning can be serious or fatal.
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[edit on Wikidata] Abdominal pain, also known as stomach pain, is a common symptom associated with both temporary, non-serious disorders and more serious conditions. Common causes of pain in the abdomen include gastroenteritis and irritable bowel syndrome. In a third of cases the exact cause is unclear. About 10% of people have a more serious underlying condition such as appendicitis, leaking or ruptured abdominal aortic aneurysm, diverticulitis, or ectopic pregnancy.
https://en.wikipedia.org/wiki/Abdominal_pain
The following conditions often cause lower abdominal pain, sometimes described as pelvic pain: 1  Appendicitis. 2  Cystitis (bladder inflammation) 3  Diverticulitis.  Problems with the cervix, such as a cervical infection, inflamed cervix or growths on the cervix.
http://www.mayoclinic.org/symptoms/abdominal-pain/basics/causes/SYM-20050728
Pancreatitis -- inflammation of the pancreas -- and pancreatic cancer are less common causes of middle upper abdominal pain. The pain from these conditions can vary from dull to severe, is usually fairly constant and often radiates to your back.
http://livehealthy.chron.com/could-cause-upper-stomach-pain-1889.html
It’s uncommon, but cancer in any one of the organs located in the abdomen—the liver, pancreas, stomach, gallbladder, or ovaries—can cause stomach pain, but usually only in the later stages, says Dr. Alaradi.
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By Mayo Clinic Staff. Abdominal pain has many potential causes. Many causes, such as gas pains or a pulled muscle, aren't serious, while other conditions require timely medical attention. Often, the location of the abdominal pain can provide an important clue as to its cause. At other times, abdominal pain may occur in unexpected patterns, and its cause is less obvious.
http://www.mayoclinic.org/symptoms/abdominal-pain/basics/causes/SYM-20050728
Stomach pain is one of the top 20 reasons people seek medical care, accounting for 1.5 percent of outpatient office visits in the U.S. Although upper abdominal pain may be related to your stomach, it could stem from other organs.
http://livehealthy.chron.com/could-cause-upper-stomach-pain-1889.html
These conditions are typically associated with a change in the form or frequency of your stool, and having a bowel movement usually changes the character of the pain. Because the “tail” of your pancreas stretches toward your left side, pancreatitis can cause left upper abdominal pain.
http://livehealthy.chron.com/could-cause-upper-stomach-pain-1889.html
what could cause stomach pain
Peptic ulcer disease, acid reflux and gastritis, or inflammation of the stomach lining can cause stomach pain. Peptic ulcer disease, acid reflux and gastritis, or inflammation of the stomach lining could cause a stomach pain.