Diarrhea and Gastroenteritis: Causes and Treatment

“What causes watery diarrhea?” and “What helps with diarrhea?” are among the most frequently searched questions by people experiencing digestive system complaints. Diarrhea and gastroenteritis are common health conditions in children, adults, and older individuals. If not properly managed, they can lead to significant fluid and electrolyte loss.

This article covers topics of interest, including the causes of diarrhea, gastroenteritis symptoms and treatment, diarrhea in babies, chronic diarrhea, and eosinophilic gastroenteritis.

What Is Gastroenteritis?

Gastroenteritis is a digestive system condition that occurs when the stomach and intestines become inflamed. Its most common causes are viruses, bacteria, and parasites. Commonly known as the “stomach flu,” it usually presents with diarrhea, vomiting, and abdominal pain.

What Are the Symptoms of Gastroenteritis?

Gastroenteritis symptoms may vary depending on the individual and the underlying cause of the condition. The most common symptoms include:

• Watery diarrhea

• Nausea and vomiting

• Abdominal pain and cramps

• Fever (particularly in children)

• Fatigue and loss of appetite

What Causes Gastroenteritis?

The most common causes of gastroenteritis include:

• Viral infections (rotavirus, norovirus)

• Bacterial infections (Salmonella, E. coli)

• Parasitic infections (Giardia)

• Consumption of unhygienic food and contaminated water

• Disruption of the intestinal flora following antibiotic use

Who Is More Likely to Develop Gastroenteritis?

• Babies and children

• Individuals aged 65 and over

• People with weakened immune systems

• People living in crowded environments (schools, dormitories, nursing homes)

How Is Gastroenteritis Diagnosed?

Gastroenteritis is diagnosed based on the patient's symptoms, physical examination, and any tests considered necessary:

• Stool tests

• Blood tests

• Endoscopy, when necessary

• Clinical evaluation

How Is Gastroenteritis Treated?

Treatment is planned according to the underlying cause of gastroenteritis:

• Viral gastroenteritis: It usually resolves on its own, and supportive treatment is provided.

• Bacterial infections: Medication may be prescribed when considered necessary.

• Fluid and electrolyte replacement: This is particularly important for children and older adults.

How Long Does Gastroenteritis Last?

• Viral gastroenteritis usually improves within 2–5 days.

• Bacterial or parasitic gastroenteritis may last longer and require treatment.

What Is Diarrhea?

Diarrhea is a condition characterized by passing loose or watery stools more than three times a day due to increased bowel movements. It can occur in either acute or chronic forms.

What Are the Causes of Diarrhea?

• Infections (viruses, bacteria, parasites)

• Food intolerances (lactose, gluten)

• Antibiotics and certain medications

• Functional bowel disorders

• Stress and anxiety

What Is Functional Diarrhea?

Functional diarrhea is a condition characterized by chronic watery stools without an underlying structural or biochemical disease. It may become more pronounced, particularly in the morning and after meals. It should not be confused with irritable bowel syndrome.

Diarrhea in Babies Requires Attention!

Diarrhea in babies can lead to significant fluid loss within a short period. Symptoms such as dry mouth, reduced urine output, crying without tears, and fatigue may indicate dehydration and require urgent medical evaluation.

Diarrhea and Gastroenteritis in Children

Gastroenteritis and diarrhea are more common in children. The rotavirus vaccine plays an important role in preventing diarrhea during childhood. Adequate fluid intake, a light diet, and medical supervision are important during treatment.

What Is Chronic Diarrhea?

Diarrhea lasting longer than four weeks is defined as chronic diarrhea. Possible causes include:

• Inflammatory bowel diseases

• Celiac disease

• Hormonal disorders

• Medication side effects

Bloody Diarrhea Is a Warning Sign!

Bloody diarrhea may indicate serious infections or inflammatory bowel diseases. In such cases, medical attention should be sought without delay.

Is Gastroenteritis Contagious?

Yes. Gastroenteritis is often contagious. Viral gastroenteritis, in particular, can spread easily through hand contact and contaminated food or water. Hand hygiene and limiting contact with infected individuals are important.

Viral Gastroenteritis and Its Treatment

Viral gastroenteritis is the most common type of gastroenteritis. Supportive treatment is sufficient in most cases. However, babies, older adults, and individuals in high-risk groups should be monitored closely.

Foods That May Help with Gastroenteritis

• Bananas

• Rice porridge

• Probiotic yogurt

• Boiled potatoes

• Applesauce

• Low-fat soups

Foods and drinks to avoid: Fatty and spicy foods, high-fiber foods, and caffeinated beverages.

Gastroenteritis in Adults

Gastroenteritis is usually mild in adults. However, more severe cases may occur in people who frequently eat out, travel, or have weakened immune systems.

Emsey Medical Editorial Board