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Diarrhea is the condition of passing loose, watery stools three times or more in a single day. Diarrhea can be acute or chronic. Acute diarrhea is a common digestive issue that lasts between one to two days and is typically caused by a bacterial, viral, or parasitic infection. Diarrhea that lasts longer than two days may be a symptom of a more serious digestive problem. In contrast, chronic diarrhea is defined as diarrhea lasting more than four weeks. Chronic diarrhea causes include digestive diseases like ulcerative colitis or Crohn’s disease. Any type of diarrhea can lead to dehydration and electrolyte imbalance as well as pain, nausea, or abdominal cramps. Treatment for acute diarrhea can vary based on the cause. If you are suffering from diarrhea, contact Dr. Cofrancesco or Dr. Quijano today in order to schedule an appointment.

Continue reading below for more information on diarrhea.

  • What is diarrhea?
  • What causes diarrhea?
  • What other symptoms accompany diarrhea?
  • When should adults with diarrhea see Dr. Cofrancesco?
  • How is the cause of diarrhea diagnosed?
  • How is diarrhea treated?
  • Can diarrhea be prevented?
  • Points to Remember

What is diarrhea?

Diarrhea is loose, watery stools. Having diarrhea means passing loose stools three or more times a day. Acute diarrhea is a common problem that usually lasts 1 or 2 days and goes away on its own.Diarrhea lasting more than 2 days may be a sign of a more serious problem. Chronic diarrhea—diarrhea that lasts at least 4 weeks—may be a symptom of a chronic disease. Chronic diarrhea symptoms may be continual or they may come and go.Diarrhea of any duration may cause dehydration, which means the body lacks enough fluid and electrolytes—chemicals in salts, including sodium, potassium, and chloride—to function properly. Loose stools contain more fluid and electrolytes and weigh more than solid stools. People of all ages can get diarrhea. In the United States, adults average one bout of acute diarrhea each year,* and young children have an average of two episodes of acute diarrhea each year.**

*DuPont HL, Practice Parameters Committee of the American College of Gastroenterology. Guidelines on acute infectious diarrhea in adults. The American Journal of Gastroenterology. 1997;92(11):1962–1975.

**Ramaswamy K, Jacobson K. Infectious diarrhea in children. Gastroenterology Clinics of North America. 2001;30(3):611–624.

What causes diarrhea?

Acute diarrhea is usually caused by a bacterial, viral, or parasitic infection. Chronic diarrhea is usually related to a functional disorder such as irritable bowel syndrome or an intestinal disease such as Crohn’s disease.

The most common causes of diarrhea include the following:

  • Bacterial infections. Several types of bacteria consumed through contaminated food or water can cause diarrhea. Common culprits include Campylobacter, Salmonella, Shigella, and Escherichia coli (E. coli).
  • Viral infections. Many viruses cause diarrhea, including rotavirus, norovirus, cytomegalovirus, herpes simplex virus, and viral hepatitis. Infection with the rotavirus is the most common cause of acute diarrhea in children. Rotavirus diarrhea usually resolves in three to seven days but can cause problems digesting lactose for up to a month or longer.
  • Parasites. Parasites can enter the body through food or water and settle in the digestive system. Parasites that cause diarrhea include Giardia lamblia, Entamoeba histolytica, and Cryptosporidium.
  • Functional bowel disorders. Diarrhea can be a symptom of irritable bowel syndrome.
  • Intestinal diseases. Inflammatory bowel disease, ulcerative colitis, Crohn’s disease, and celiac disease often lead to diarrhea.
  • Food intolerances and sensitivities. Some people have difficulty digesting certain ingredients, such as lactose, the sugar found in milk and milk products. Some people may have diarrhea if they eat certain types of sugar substitutes in excessive quantities.
  • Reaction to medicines. Antibiotics, cancer drugs, and antacids containing magnesium can all cause diarrhea.

Some people develop diarrhea after stomach surgery, which may cause food to move through the digestive system more quickly. People who visit certain foreign countries are at risk for traveler’s diarrhea, which is caused by eating food or drinking water contaminated with bacteria, viruses, or parasites. Traveler’s diarrhea can be a problem for people traveling to developing countries in Africa, Asia, Latin America, and the Caribbean. Visitors to Canada, most European countries, Japan, Australia, and New Zealand do not face much risk for traveler’s diarrhea.

In many cases, the cause of diarrhea cannot be found. As long as diarrhea goes away on its own within 1 to 2 days, finding the cause is not usually necessary.

What other symptoms accompany diarrhea?

Diarrhea may be accompanied by cramping, abdominal pain, nausea, an urgent need to use the bathroom, or loss of bowel control. Some infections that cause diarrhea can also cause a fever and chills or bloody stools.


Diarrhea can cause dehydration. Loss of electrolytes through dehydration affects the amount of water in the body, muscle activity, and other important functions. Dehydration is particularly dangerous in children, older adults, and people with weakened immune systems. Dehydration must be treated promptly to avoid serious health problems, such as organ damage, shock, or coma (a sleeplike state in which you are not conscious).

Signs of dehydration in adults include

  • thirst
  • less frequent urination than usual
  • dark-colored urine
  • dry skin
  • fatigue
  • dizziness
  • light-headedness

Also, when people are dehydrated, their skin does not flatten back to normal right away after being gently pinched and released. Anyone with signs of dehydration should see Dr. Cofrancesco or Dr. Quijano immediately. Severe dehydration may require hospitalization.Although drinking plenty of water is important in preventing dehydration, water does not contain electrolytes. Adults can prevent dehydration by also drinking liquids that contain electrolytes, such as fruit juices, sports drinks, caffeine-free soft drinks, and broths.

When should adults with diarrhea see Dr. Cofrancesco or Dr. Quijano?

Adults with any of the following symptoms should see Dr. Cofrancesco or Dr. Quijano:

  • signs of dehydration
  • diarrhea for more than 4-5 days
  • severe pain in the abdomen or rectum
  • a fever of 102 degrees or higher
  • stools containing blood or pus
  • stools that are black and tarry

Diarrhea is not usually harmful, but it can become dangerous or signal a more serious problem.

How is the cause of diarrhea diagnosed?

If acute diarrhea lasts 2 days or less, diagnostic tests are usually not necessary. If diarrhea lasts longer or is accompanied by symptoms such as fever or bloody stools, Dr. Cofrancesco or Dr. Quijano may perform tests to determine the cause.

Diagnostic tests to find the cause of diarrhea may include the following:

  • Medical history and physical examination. Dr. Cofrancesco or Dr. Quijano will ask about eating habits and medication use and will perform a physical examination to look for signs of illness.
  • Stool culture. A sample of stool is analyzed in a laboratory to check for bacteria, parasites, or other signs of disease and infection.
  • Blood tests. Blood tests can be helpful in ruling out certain diseases.
  • Fasting tests. To find out if a food intolerance or allergy is causing the diarrhea, Dr. Cofrancesco or Dr. Quijano may ask you to avoid foods with lactose, carbohydrates, wheat, or other ingredients to see whether the diarrhea responds to a change in diet.
  • Colonoscopy. These tests may be used to look for signs of intestinal diseases that cause chronic diarrhea. For colonoscopy, Dr. Cofrancesco or Dr. Quijano uses a thin, flexible, lighted tube with a lens on the end to look at the inside of the rectum entire colon.

How is diarrhea treated?

In most cases of diarrhea, the only treatment necessary is replacing lost fluids and electrolytes to prevent dehydration.

Over-the-counter medicines such as loperamide (Imodium) and bismuth subsalicylate (Pepto-Bismol and Kaopectate) may help stop diarrhea in adults. However, people with bloody diarrhea—a sign of bacterial or parasitic infection—should not use these medicines. If diarrhea is caused by bacteria or parasites, over-the-counter medicines may prolong the problem. Instead Dr. Cofrancesco or Dr. Quijano may prescribe antibiotics.

Eating, Diet, and Nutrition

Until diarrhea subsides, avoiding caffeine and foods that are greasy, high in fiber, or sweet may lessen symptoms. These foods can aggravate diarrhea. Some people also have problems digesting lactose during or after a bout of diarrhea. Yogurt, which has less lactose than milk, is often better tolerated. Yogurt with active, live bacterial cultures may even help people recover from diarrhea more quickly.

As symptoms improve, soft, bland foods can be added to the diet, including bananas, plain rice, boiled potatoes, toast, crackers, cooked carrots, and baked chicken without the skin or fat. For children, Dr. Cofrancesco and Dr. Quijano may also recommend a bland diet. Once the diarrhea stops, Dr. Cofrancesco and Dr. Quijano will likely encourage you to return to a normal and healthy diet if it can be tolerated.

Can diarrhea be prevented?

A common form of diarrhea that can be prevented is Traveler’s Diarrhea.To prevent traveler’s diarrhea, people traveling from the United States to developing countries should avoid

  • drinking tap water, using tap water to brush their teeth, or using ice made from tap water
  • drinking unpasteurized milk or milk products
  • eating raw fruits and vegetables, including lettuce and fruit salads, unless they peel the fruits or vegetables themselves
  • eating raw or rare meat and fish
  • eating meat or shellfish that is not hot when served
  • eating food from street vendors

Travelers can drink bottled water, soft drinks, and hot drinks such as coffee or tea.

People concerned about traveler’s diarrhea should talk with Dr. Cofrancesco or Dr. Quijano before traveling. He may recommend that travelers bring medicine with them in case they develop diarrhea during their trip. Dr. Cofrancesco or Dr. Quijano may advise some people—especially people with weakened immune systems—to take antibiotics before and during a trip to help prevent traveler’s diarrhea. Early treatment with antibiotics can shorten a bout of traveler’s diarrhea.

Points to Remember

  • Diarrhea is loose, watery stools. Having diarrhea means passing loose stools three or more times a day.
  • Diarrhea is a common problem that usually goes away on its own.
  • The most common causes of diarrhea include bacterial, viral, and parasitic infections; functional bowel disorders; intestinal diseases; food intolerances and sensitivities; and reactions to medicines.
  • Diarrhea can cause dehydration, which is particularly dangerous in children, older adults, and people with weakened immune systems.
  • Treatment involves replacing lost fluids and electrolytes. Depending on the cause of the problem, medication may also be needed to stop the diarrhea or treat an infection.
  • Adults with any of the following symptoms should see Dr. Cofrancesco or Dr. Quijano: signs of dehydration, diarrhea for more than 2 days, severe pain in the abdomen or rectum, a fever of 102 degrees or higher, stools containing blood or pus, or stools that are black and tarry.
  • People can take steps to prevent traveler’s diarrhea.

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