Abdominal sounds are the noises made by the intestines.
Abdominal sounds (bowel sounds) are made by the movement of the intestines as they push food through. Since the intestines are hollow, bowel sounds can echo through the abdomen much like the sounds heard from water pipes.
Most bowel sounds are harmless and simply mean that the gastrointestinal tract is working. A doctor can check abdominal sounds by listening to the abdomen with a stethoscope (
Although most bowel sounds are normal, there are some instances in which abnormal bowel sounds provide valuable information about the health of the body.
Reduced (hypoactive) bowel sounds include a reduction in the loudness, tone, or regularity of the sounds. They are a sign that intestinal activity has slowed.
Hypoactive bowel sounds are normal during sleep, and also occur normally for a short time after the use of certain medications and after abdominal surgery. Decreased or absent bowel sounds often indicate constipation.
Increased (hyperactive) bowel sounds can sometimes be heard even without a stethoscope.
Abdominal sounds are always evaluated together with symptoms such as:
Presence or absence of bowel movements
If bowel sounds are hypoactive or hyperactive and there are other abnormal symptoms, it is important for you to have continued follow-up with your health care provider.
For example, no bowel sounds after a period of hyperactive bowel sounds can mean there is a rupture of the intestines, or strangulation of the bowel and death (
Very high-pitched bowel sounds may be a sign of early bowel obstruction.
Most of the sounds you hear in your stomach and intestines are due to normal digestion and are no need for concern. Many conditions can cause hyperactive or hypoactive bowel sounds. Most are harmless and do not need to be treated.
The following is a list of more serious conditions that can cause abnormal bowel sounds.
Hyperactive, hypoactive, or missing bowel sounds:
- Blocked blood vessels prevent the intestines from getting proper blood flow. For example,
blood clotscan cause mesenteric artery occlusion.
bowel obstructionis caused by hernia, tumor, adhesions, or similar conditions that can block the intestines. Paralytic ileusis a problem with the nerves to the intestines. Reduced nerve activity can result from:
- Blood vessel blockage
- Bowel blockage
- Chemical imbalances such as
- Overexpansion of the bowel
Other causes of hypoactive bowel sounds:
- Drugs that slow down movement in the intestines such as opiates (including codeine), anticholinergics, and phenothiazines
- Radiation to the abdomen
- Spinal anesthesia
- Surgery in the abdomen
Other causes of hyperactive bowel sounds:
Food allergy GI bleeding
enteritis Ulcerative colitis
Call your health care provider if
Call your health care provider if you have any symptoms such as:
Bleeding from your rectum
Diarrhea or constipation that continues
What to expect at your health care provider’s office
The doctor or nurse will examine you and ask you questions about your medical history and symptoms. You may be asked:
- What other symptoms do you have?
- Do you have abdominal pain?
- Do you have diarrhea or constipation?
- Do you have
- Do you have
excessive or absent gas (flatus)?
- Have you noticed any bleeding from the rectum or black stools?
The doctor may order more tests. Tests may include:
Abdominal CT scan Abdominal x-ray
- Blood tests
If there are signs of an emergency, you will be sent to the hospital. A tube will be placed through your nose or mouth into the stomach or intestines. This empties your intestines. Usually, you will not be allowed to eat or drink anything so your intestines can rest. You will be given fluids through a vein (intravenously).
You may be given medication to reduce symptoms and to treat the cause of the problem. (The specific medication depends on the situation.) Some people may need surgery right away.