Abdominal Pain is felt in the abdomen. The abdomen is an anatomical area that is bounded by the lower margin of the ribs and diaphragm above, the pelvic bone (pubic ramus) below, and the flanks on each side. Although pain can arise from the tissues of the abdominal wall that surround the abdominal cavity (such as the skin and muscles), the term abdominal pain generally is used to describe discomfort originating from organs within the abdominal cavity. Organs of the abdomen include the stomach, small intestine, colon, liver, gallbladder, spleen, and pancreas.
Technically, the lowermost portion of the area described previously, is the pelvis, which contains the urinary bladder and rectum, as well as the prostate gland in men, and the uterus, Fallopian tubes, and ovaries in women. Often, it can be difficult to know if lower abdominal pain is coming from the lower abdomen or pelvis (pelvic pain).
Occasionally, pain may be felt in the belly even though it is arising from organs that are close to, but not within, the abdominal cavity, for example, conditions of the lower lungs, the kidneys, and the uterus or ovaries. On the other hand, it also is possible for pain from organs within the belly to be felt outside of the it. For example, the pain of pancreatic inflammation may be felt in the back. These latter types of pain are described as “referred” because it does not originate in the location that it is felt. Rather, the cause is located away from where it is felt (i.e., it is referred to a different area).
Abdominal Pain Causes
Abdominal pain is a common symptom, and most people have experienced some sort of abdominal pain (belly or stomach pain). Causes of more serious causes of abdominal pain include:
• Bloody stools
• Black tarry stools
• Painful urination
• Lack of urination
• Abrupt cessation of bowel movements
What causes abdominal pain?
Abdominal pain is caused by inflammation of an organ (for example, appendicitis, diverticulitis, colitis), by stretching or distention of an organ (for example, obstruction of the intestine, blockage of a bile duct by gallstones, swelling of the liver with hepatitis), or by loss of the supply of blood to an organ (for example, ischemic colitis).
To complicate matters, however, abdominal pain also can occur without inflammation, distention or loss of blood supply. An important example of the latter is the irritable bowel syndrome (IBS). It is not clear what causes the belly pain in IBS, but it is believed to be due either to abnormal contractions of the intestinal muscles (for example, spasm) or abnormally sensitive nerves within the intestines that give rise to painful sensations inappropriately (visceral hyper-sensitivity). This often is referred to as functional pain because no recognizable specific abnormality to account for the cause has been found – at least not yet.