Diarrhoea is a condition that affects the digestive system, leading to the rapid passage of stool through the intestines. It can occur as a result of an infection, inflammation, or an underlying medical condition. Diarrhoea is often accompanied by symptoms such as abdominal pain, cramping, dehydration, and fever.

What Causes Diarrhoea?

  • Viral Infections: Viral infections are one of the most common causes of diarrhoea. Viruses such as rotavirus, norovirus, and enterovirus can infect the gastrointestinal tract and cause inflammation, leading to diarrhoea.
  • Bacterial Infections: Bacterial infections, such as those caused by Escherichia coli (E. coli), Salmonella, Shigella, and Campylobacter bacteria, can also result in diarrhoea. These bacteria are often transmitted through contaminated food or water.
  • Parasitic Infections: Parasites like Giardia lamblia and Cryptosporidium can cause diarrhoea when they infect the digestive system. These parasites are usually found in contaminated water sources or poor sanitation conditions.
  • Food Intolerances and Allergies: Certain individuals may experience diarrhoea as a result of food intolerances or allergies. Lactose intolerance, gluten sensitivity, and reactions to specific food ingredients can trigger diarrhoea in susceptible individuals.
  • Medications: Some medications, such as antibiotics, antacids, and chemotherapy drugs, can disrupt the normal balance of bacteria in the gut and lead to diarrhoea as a side effect.
  • Digestive Disorders: Digestive disorders like inflammatory bowel disease (IBD), irritable bowel syndrome (IBS), and celiac disease can cause chronic diarrhoea due to inflammation or malabsorption.

Types of Diarrhoea

Diarrhoea can be classified into different types based on its duration and underlying causes. Understanding the type of diarrhoea helps in determining the appropriate treatment approach.

Acute Diarrhoea

Acute diarrhoea refers to a sudden onset of diarrhoea that lasts for a short duration, usually a few days to a week. Viral or bacterial infections commonly cause it and can be accompanied by other symptoms like fever and vomiting.

Chronic Diarrhoea

Chronic diarrhoea is characterized by persistent diarrhoea that lasts for more than four weeks. It may be a sign of an underlying health condition, such as IBD, IBS, or malabsorption disorders.

Traveller’s Diarrhoea

Traveller’s diarrhoea is a specific type of acute diarrhoea that occurs when individuals travel to foreign countries or regions with different sanitary conditions. It is often caused by consuming contaminated food or water.

Symptoms and Signs of Diarrhoea

The symptoms of diarrhoea can vary depending on the underlying cause and severity of the condition. Common signs and symptoms include:

  • Frequent Loose Stools: Diarrhoea is characterized by the passage of loose or watery stools more frequently than usual. The consistency of the stool may range from semi-formed to completely liquid.
  • Abdominal Pain and Cramping: Many people with diarrhoea experience abdominal pain and cramping. The discomfort is often caused by increased bowel contractions and inflammation in the digestive tract.
  • Dehydration: Diarrhoea can lead to dehydration, especially if it persists for an extended period. Signs of dehydration include increased thirst, dry mouth, decreased urine output, and fatigue.
  • Fever: In some cases, diarrhoea may be accompanied by a fever. Fever is often a sign of an underlying infection, such as a bacterial or viral illness.
  • Nausea and Vomiting: Nausea and vomiting can occur alongside diarrhoea, particularly in cases of severe gastrointestinal infections or food poisoning.
  • Blood in Stool: In certain situations, diarrhoea may be accompanied by blood in the stool. This can indicate a more serious underlying condition and should be evaluated by a healthcare professional.

Diagnosing Diarrhoea

Diagnosing the cause of diarrhoea involves a combination of medical history evaluation, physical examination, and diagnostic tests. The following methods are commonly used for diagnosing diarrhoea:

  • Medical History and Physical Examination: During the medical history assessment, the healthcare provider will ask about the duration and frequency of diarrhoea, accompanying symptoms, recent travel, and potential exposure to infectious agents. A physical examination may also be conducted to evaluate signs of dehydration or abdominal tenderness.
  • Stool Tests: Stool tests are frequently performed to identify the presence of infectious agents such as bacteria, viruses, or parasites. These tests can include stool culture, stool antigen tests, or examination for ova and parasites.
  • Blood Tests: Blood tests may be ordered to check for signs of infection, inflammation, or other abnormalities that could be contributing to diarrhoea. Blood tests can provide information about electrolyte levels, kidney function, and overall health status.
  • Imaging Tests: In certain cases, imaging tests such as X-rays, ultrasound, or CT scans may be recommended to assess the structure and function of the digestive system. These tests are typically used when there is a suspicion of underlying structural abnormalities or complications.
  • Endoscopy and Colonoscopy: Endoscopy and colonoscopy are procedures that involve inserting a flexible tube with a camera into the digestive tract to visualize the inner lining of the oesophagus, stomach, small intestine, and colon. These procedures are helpful for evaluating inflammation, ulcers, or other abnormalities that may be causing diarrhoea.

Treatment Options for Diarrhoea

The treatment approach for diarrhoea depends on the underlying cause, severity of symptoms, and the individual’s overall health condition. The following treatment options are commonly utilized:

Rehydration Therapy

Rehydration therapy is a crucial aspect of managing diarrhoea, particularly when dehydration is present. Oral rehydration solutions (ORS) containing a balanced combination of salts and glucose are recommended to replace lost fluids and electrolytes. In severe cases, intravenous (IV) fluids may be necessary.

Antidiarrheal Medications

Antidiarrheal medications, such as loperamide, can help alleviate symptoms of diarrhoea by slowing down bowel movements. However, these medications should be used cautiously and under medical supervision, as they may not be suitable for certain individuals or specific types of diarrhoea.

Antibiotics (if bacterial infection)

If the diarrhoea is caused by a bacterial infection, antibiotics may be prescribed to target the specific bacteria responsible for the illness. It is essential to complete the full course of antibiotics as prescribed by the healthcare provider.

Dietary Changes

Making dietary modifications can be beneficial in managing diarrhoea. The BRAT diet (consisting of bananas, rice, applesauce, and toast) is often recommended as it helps bind the stools and provides easily digestible foods. Gradually reintroducing a balanced diet rich in fibre, lean proteins, and probiotics is advised as the symptoms improve.


Probiotics are beneficial bacteria that can help restore the natural balance of the gut microbiota. They are available in various forms, such as capsules, powders, and fermented foods. Probiotics may help reduce the duration and severity of diarrhoea, especially in cases associated with antibiotic use or certain infections.

Prevention and Home Remedies for Diarrhoea

Preventing diarrhoea involves practising good hygiene and adopting certain preventive measures. Additionally, some home remedies can help alleviate symptoms and promote recovery. Here are some prevention strategies and home remedies to consider:

Good Hygiene Practices

Maintaining good hygiene is crucial in preventing diarrhoea. This includes regular handwashing with soap and clean water, especially before handling food, after using the toilet, and after contact with potentially contaminated surfaces.

Safe Food and Water

Consuming safe and properly prepared food is essential for preventing diarrhoea. It is recommended to wash fruits and vegetables thoroughly, cook meat and seafood thoroughly, and avoid consuming raw or undercooked foods. Drinking clean and treated water is also vital.


Proper handwashing is a simple yet effective way to prevent the spread of diarrhoea-causing pathogens. Use soap and clean water, lather the hands for at least 20 seconds, paying attention to the areas between fingers, under nails, and wrists, and rinse thoroughly.

Oral Rehydration Solution (ORS)

ORS solutions are readily available and can be used to prevent dehydration during diarrhoea episodes. These solutions contain a balanced combination of salts and glucose that help replace lost fluids and electrolytes.


The BRAT diet, consisting of bananas, rice, applesauce, and toast, can be followed during diarrhoea to provide easily digestible foods that help bind the stools. Additionally, including other easily digestible foods like boiled potatoes, yoghurt, and cooked carrots can be beneficial.

Herbal and Natural Remedies

Certain herbal teas, such as chamomile or peppermint tea, may help soothe the digestive system and relieve symptoms of diarrhoea. However, it is important to consult with a healthcare professional before using any herbal remedies, as some may interact with medications or have adverse effects.

When to Seek Medical Attention

In some cases, diarrhoea may require medical attention. It is important to seek medical care if any of the following situations occur:

Severe Dehydration

Signs of severe dehydration, such as excessive thirst, dry mouth, sunken eyes, rapid heartbeat, or reduced urine output, require immediate medical attention. Severe dehydration can be life-threatening and may require intravenous fluids.

Persistent Diarrhoea

If diarrhoea persists for more than a few days or if it worsens despite home care measures, it is advisable to consult a healthcare professional. Chronic or recurrent diarrhoea may indicate an underlying medical condition that needs evaluation and treatment.

Blood in Stool

The presence of blood in the stool is a concerning symptom that requires prompt medical evaluation. It may indicate an infection, inflammatory bowel disease, or other gastrointestinal disorders that require further investigation.

High Fever

If diarrhoea is accompanied by a high fever (above 101°F or 38.3°C), it is advisable to seek medical attention. High fever may indicate a more severe infection or systemic illness that requires medical evaluation and treatment.

Complications of Diarrhoea

If left untreated or if severe diarrhoea persists, it can lead to various complications:


Dehydration is one of the most common complications of diarrhoea. When the body loses significant amounts of fluids and electrolytes through diarrhoea, it can disrupt the normal functioning of organs and systems.

Electrolyte Imbalance

Prolonged diarrhoea can cause an imbalance of electrolytes in the body, such as sodium, potassium, and chloride. Electrolytes are essential for proper nerve and muscle function, and imbalances can lead to weakness, dizziness, or irregular heart rhythms.


Frequent diarrhoea can interfere with the body’s ability to absorb nutrients properly, leading to malnutrition over time. This is particularly concerning in children, older adults, and individuals with compromised immune systems.

Kidney Problems

Severe dehydration resulting from diarrhoea can put a strain on the kidneys and potentially lead to kidney damage or kidney failure. It is essential to replenish fluids and electrolytes promptly to prevent kidney-related complications.

Intestinal Damage

In some cases, persistent diarrhoea can cause damage to the intestinal lining, leading to further digestive issues or chronic conditions like IBD.


1. Is diarrhoea contagious?

Diarrhoea can be contagious if it is caused by an infectious agent such as bacteria or viruses. It is important to practice good hygiene and take appropriate precautions to prevent the spread of diarrhoea-causing pathogens.

2. Can stress or anxiety cause diarrhoea?

Yes, stress and anxiety can contribute to diarrhoea in some individuals. The gut-brain connection plays a role in bowel function, and stress can disrupt the normal functioning of the digestive system.

3. Are probiotics effective in treating diarrhoea?

Probiotics have shown promise in managing certain types of diarrhoea, such as antibiotic-associated diarrhoea and infectious diarrhoea. However, the effectiveness of probiotics may vary depending on the specific strain used and the underlying cause of diarrhoea.

4. Can I prevent traveller’s diarrhoea?

Travellers’ diarrhoea can be prevented by practising good hygiene, such as washing hands regularly, avoiding tap water and ice cubes in regions with questionable sanitation, and consuming safe and properly cooked food.

5. When should I consult a doctor for diarrhoea?

You should consult a doctor if you experience a severe or persistent diarrhoea, blood in the stool, high fever, signs of dehydration, or if your symptoms worsen despite home care measures. A healthcare professional can evaluate your condition and recommend appropriate treatment options.

By Dr.Dimpal Baldha

I'm DR. Dimple Baldha, an Ayurvedic doctor and I have treated more than a thousand patients in my couple of years of experience in this field. This has given me a lot of insights and positive areas to work with people from different parts of the world managing arthritis issues, Dietary changes, healthy lifestyles, and metabolic disorders. I have good knowledge of Ayurvedic medicine, Panchkarma treatment, Healthy lifestyle and yoga. I have treated so many diseases like spondylitis, psoriasis, allergies and bronchial asthma. Talks about #health, #ayurveda, #wellness, #healthylifestyle

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