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Constipation

What is Constipation?

Constipation is defined as having a bowel movement fewer than three times per week. With constipation stools are usually hard, dry, small in size, and difficult to eliminate. Some people who are constipated find it painful to have a bowel movement and often experience straining, bloating, and 
the sensation of a full bowel. Some people think they are constipated if they do not have a bowel movement every day. However, normal stool elimination may be three times a day or three times a 
week, depending on the person. Constipation is a symptom, not a disease. Almost everyone experiences constipation at some point in their life, and a poor diet typically is the cause. Most constipation is 
temporary and not serious.  Understanding its causes, prevention, and treatment will help most people find relief.

Who gets constipated? 

Constipation is one of the most common gastrointestinal complaints in the United States. More than 4 million Americans have frequent constipation, accounting for 2.5 million physician visits a year. 
Those reporting constipation most often are women and adults ages 65 and older. Pregnant women may have constipation, and it is a common problem following child­birth or surgery. Self-treatment of constipation with over­-the-counter (OTC) laxatives is by far the most common aid. Around $725 million is spent on laxative products each year in America.

What causes constipation? 

To understand constipation, it helps to know how the colon, or large intestine, works. As food moves through the colon, the colon absorbs water from the food while it forms waste products, or stool. Muscle contractions in the colon then push the stool toward the rectum. By the time stool reaches the rectum it is solid, because most of the water has been absorbed. 
Constipation occurs when the colon absorbs too much water or if the colon's muscle con­tractions are slow or sluggish, causing the stool to move through the colon too slowly. As a result, stools can become hard and dry. Common causes of constipation are:
 not enough fiber in the diet 
 lack of physical activity (especially in the elderly) 
medications 
milk 
 irritable bowel syndrome 
 changes in life or routine such as preg­nancy, aging, and travel 
 abuse of laxatives 
 ignoring the urge to have a bowel movement 
 dehydration 
specific diseases or conditions, such as stroke (most common) 
 problems with the colon and rectum 
 problems with intestinal function

Not Enough Fiber in the Diet 

People who eat a high-fiber diet are less likely to become constipated. The most common causes of constipation are a diet low in fiber or a diet high in fats, such as cheese, eggs, and meats. 
Fiber—both soluble and insoluble—is the part of fruits, vegetables, and grains that the body cannot digest. Soluble fiber dissolves easily in water and takes on a soft, gel-like texture in the intestines. Insoluble fiber passes through the intestines almost unchanged. The bulk and soft texture of fiber help prevent hard, dry stools that are difficult to pass.
Americans eat an average of 5 to 14 grams of fiber daily,* which is short of the 20 to 35 grams recommended by the American Dietetic Association.  Both children and adults often eat too many refined and processed foods from which the natural fiber has been removed. A low-fiber diet also plays a key role in con­stipation among older adults, who may lose interest in eating and choose foods that are 
quick to make or buy, such as fast foods, or prepared foods, both of which are usually low in fiber.  Also, difficulties with chewing or swallowing may cause older people to eat soft foods that are processed and low in fiber.

Not Enough Liquids 

Research shows that although increased fluid intake does not necessarily help relieve constipation, many people report some relief from their constipation if they drink fluids such as water and juice and 
avoid dehydration. Liquids add fluid to the colon and bulk to stools, making bowel movements softer and easier to pass. People who have problems with constipation should try to drink liquids every day. However, liq­uids that contain caffeine, such as coffee and cola drinks will worsen one's symptoms by 
causing dehydration. Alcohol is another beverage that causes dehydration. It is important to drink fluids that hydrate the body, especially when consuming caffeine containing drinks or alcoholic beverages.

Lack of Physical Activity 

A lack of physical activity can lead to constipation, although doctors do not know precisely why. For example, constipation often occurs after an accident or during an illness when one must stay in bed and cannot exercise. Lack of physical activity is thought to be one of the reasons constipation is common in older people. 

Medications 

Some medications can cause constipation, including:
 pain medications (especially narcotics) 
 antacids that contain aluminum and calcium 
 blood pressure medications (calcium channel blockers) 
 antiparkinson drugs 
 antispasmodics 
 antidepressants 
 iron supplements 
 diuretics 
 anticonvulsants

Changes in Life or Routine

During pregnancy, women may be consti­pated because of hormonal changes or because the uterus compresses the intestine. Aging may also affect bowel regularity, because a slower metabolism results in less intestinal activity and muscle tone. In addi­tion, people often become constipated when 
traveling, because their normal diet and daily routine are disrupted.

Abuse of Laxatives 

The common belief that people must have a daily bowel movement has led to self-medicating with OTC laxative products. Although people may feel relief when they use laxatives, typically they must increase 
the dose over time because the body grows reliant on laxatives in order to have a bowel movement. As a result, laxatives may become habit-forming. 

Ignoring the Urge to Have a Bowel Movement 

People who ignore the urge to have a bowel movement may eventually stop feeling the need to have one, which can lead to consti­pation. Some people delay having a bowel movement because they do not want to use toilets outside the home. Others ignore the urge because of emotional stress or because 
they are too busy. Children may postpone having a bowel movement because of stress­ful toilet training or because they do not want to interrupt their play. 
 


 

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