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Diarrhoea is when your bowel movements become loose or watery. The definition of diarrhoea is passing loose or watery bowel movements 3 or more times in a day (or more frequently than usual).
Many cases of diarrhoea are self-limiting and don’t need specific treatment. However, it’s important in any case of diarrhoea to stay hydrated by drinking plenty of liquids.
Diarrhoea occurs when the lining of the intestine is unable to absorb fluid, or it actively secretes fluid. There are many causes, including infection and inflammation.
Severe diarrhoea leads to fluid loss, and may be life-threatening, particularly in young children and people who are malnourished or have impaired immunity.
Fast facts on diarrhea
Here are some key points about diarrhea. More detail and supporting information is in the body of this article.
- Most cases of diarrhea are caused by bacteria, viruses, or parasites
- Inflammatory bowel diseases (IBD) including crohn’s disease and ulcerative colitis can cause chronic diarrhea
- Antidiarrheal medications can reduce diarrheal output and zinc supplement is effective in children
- Some nutritional and probiotic intervention may help prevent diarrhea.
causes–
Most cases of diarrhea are caused by an infection in the gastrointestinal tract. The microbes responsible for this infection include:
- bacteria
- viruses
- parasitic organisms
The most commonly identified causes of acute diarrhea in the United States are the bacteria Salmonella, Campylobacter, Shigella, and Shiga-toxin-producing Escherichia coli.
Some cases of chronic diarrhea are called “functional” because a clear cause cannot be found. In the developed world, irritable bowel syndrome (IBS) is the most common cause of functional diarrhea.
IBS is a complex of symptoms. There is cramping abdominal pain and altered bowel habits, including diarrhea, constipation, or both.
Inflammatory bowel disease (IBD) is another cause of chronic diarrhea. It is a term used to describe either ulcerative colitis or Crohn’s disease. There is often blood in the stool in both conditions.
Other major causes of chronic diarrhea include:
- Microscopic colitis: This is a persistent diarrhea that usually affects older adults, often during the night.
- Malabsorptive and maldigestive diarrhea: The first is caused by impaired nutrient absorption, the second by impaired digestive function. Celiac disease is one example.
- Chronic infections: A history of travel or antibiotic use can be clues to chronic diarrhea. Various bacteria and parasites can be the cause.
- Drug-induced diarrhea: Laxatives and other drugs, including antibiotics, can trigger diarrhea.
- Endocrine causes: Sometimes hormonal factors cause diarrhea, for example, in the case of Addison disease and carcinoid tumors.
- Cancer causes: Neoplastic diarrhea is associated with a number of gut cancers.
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Treatment
Mild cases of acute diarrhea may resolve without treatment. Persistent or chronic diarrhea will be diagnosed and any underlying causes will be treated in addition to the symptoms of diarrhea.
Dehydration
For all cases of diarrhea, rehydration is key:
- Fluids can be replaced by simply drinking more fluids, or they can be received intravenously in severe cases. Children and older people are more vulnerable to dehydration.
- Oral rehydration solution or salts (ORS) refers to water that contains salt and glucose. It is absorbed by the small intestine to replace the water and electrolytes lost in the stool. In developing countries, ORS costs just a few cents. The World Health Organization (WHO) says ORS can safely and effectively treat over 90 percent of non-severe diarrhea cases.
- Oral rehydration products, such as Oralyte and Rehydralyte, are available commercially. Zinc supplementation may reduce the severity and duration of diarrhea in children. Various products are available to purchase online.
Antidiarrheal medication
Over-the-counter (OTC) antidiarrheal medicines are also available:
- Loperamide, or Imodium, is an antimotility drug that reduces stool passage. Loperamide and Imodium are both available to purchase over-the-counter or online.
- Bismuth subsalicylate, for example, Pepto-Bismol, reduces diarrheal stool output in adults and children. It can also be used to prevent traveler’s diarrhea. The can be bought online as well as over-the-counter.
There is some concern that antidiarrheal medications could prolong bacterial infection by reducing the removal of pathogens through stools.
Antibiotics
Antibiotics are only used to treat diarrhea caused by a bacterial infection. If the cause is a certain medication, switching to another drug might be possible.
Symptoms-
Diarrhea refers to watery stools, but it may be accompanied by other symptoms.
These include:
- stomach pain
- abdominal cramps
- bloating
- thirst
- weight loss
- fever
Diarrhea is a symptom of other conditions, some of which can be serious.
Other possible symptoms are:
- blood or pus in the stools
- persistent vomiting
- dehydration
If these accompany diarrhea, or if the diarrhea is chronic, it may indicate a more serious illness.
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