Understanding Diarrhea: Causes, Treatment, and Prevention
Diarrhea is a symptom, not a disease, defined by passing three or more loose or watery stools per day. Acute diarrhea usually lasts a few days and resolves on its own, while chronic diarrhea lasts more than four weeks and may signal an underlying condition like Crohn’s disease or ulcerative colitis. Children and infants with persistent diarrhea should see a doctor.
Diarrhea occurs when stool moves too quickly through the intestines, preventing proper water absorption. Common causes include:
- Bacterial or viral infections, such as salmonella or rotavirus
- Medications, including antibiotics or certain blood pressure drugs
- Digestive issues like lactose intolerance or malabsorption
- Intestinal diseases like Crohn’s or ulcerative colitis
- Parasites, particularly during travel
- Functional bowel disorders, thyroid issues, or stress
Treatment focuses on relieving symptoms and preventing dehydration, especially in children and seniors. Many cases resolve naturally within 24–48 hours. Drinking plenty of clear fluids or oral rehydration solutions is essential. Once rehydrated, age-appropriate foods can be gradually reintroduced. Eating stool-binding foods, like bananas, rice, applesauce, and toast (the BRAT diet), can help.
If diarrhea persists or is caused by bacteria or parasites, a doctor may recommend antibiotics. Medications such as loperamide or bismuth subsalicylate can provide symptom relief. Signs of dehydration—including dry mouth, dizziness, decreased urination, and weakness—require immediate attention.
Preventing future episodes involves practicing good hygiene and food safety: wash hands frequently, avoid undercooked meat or raw seafood, and handle food safely. Identifying triggers and taking precautions can reduce the risk of recurrence.
