What Are the Causes of Diarrhea?
Loose, watery stools three or more times a day – most of us have experienced this at some point. While it often goes away on its own, diarrhea can sometimes signal a deeper digestive problem. Understanding the causes of diarrhea is the first step toward feeling better and preventing it from coming back.
In this blog, Dr. Mukesh Nandal, a trusted gastroenterologist in Gurgaon, breaks down everything you need to know about diarrhea – in simple, easy-to-understand language.
What Is Diarrhea?
Diarrhea is a condition where your stools become loose or watery, and you need to visit the toilet more frequently than usual. It can last for a short time (acute diarrhea) or continue for weeks (chronic diarrhea). Both types have different causes and require different approaches to treatment.
Common Causes of Diarrhea
1. Infections
One of the most frequent causes of diarrhea in India is an infection – either bacterial, viral, or parasitic.
- Bacterial infections: Eating contaminated food or drinking unclean water can introduce bacteria like Salmonella, E. coli, or Vibrio cholerae into your gut, leading to sudden and severe diarrhea.
- Viral infections: Rotavirus and norovirus are common culprits, especially in children. These spread easily in crowded places.
- Parasitic infections: Parasites like Giardia lamblia and Entamoeba histolytica are common in areas with poor sanitation and are a well-known cause of loose motions in India.
“In my practice at Narayana Hospital and Atharva Gastro Clinic, I see a significant number of patients with infection-related diarrhea, especially during summers and monsoon season. Food and water hygiene remain the biggest risk factors,” says Dr. Mukesh Nandal.
2. Food Intolerance and Sensitivity
Many people are unaware that certain foods can trigger diarrhea. Common examples include:
- Lactose intolerance: Inability to digest milk and dairy products properly
- Gluten sensitivity: Reaction to wheat, barley, or rye
- Spicy or oily food: A very common cause of loose motions among the Indian population
- Artificial sweeteners: Found in sugar-free products, they can irritate the digestive tract
3. Medications
Some medicines directly affect your gut. The causes of diarrhea related to medications include:
- Antibiotics: They can disturb the natural bacteria in your gut, leading to loose stools
- Antacids containing magnesium
- Laxatives when taken in excess
- Chemotherapy drugs
If you suspect your medicine is causing diarrhea, always consult your doctor before stopping it.
4. Irritable Bowel Syndrome (IBS)
IBS is a very common digestive disorder that affects millions of Indians. In the diarrhea-predominant type of IBS, patients experience frequent loose motions, stomach cramping, and bloating – often triggered by stress, certain foods, or hormonal changes.
5. Inflammatory Bowel Disease (IBD)
Conditions like Crohn’s disease and Ulcerative Colitis cause chronic inflammation in the digestive tract. They are serious causes of diarrhea that require long-term medical management by a qualified gastroenterologist.
6. Stress and Anxiety
The gut and brain are closely connected through what is called the gut-brain axis. Emotional stress, exam anxiety, or trauma can all cause physical symptoms in the digestive system, including loose motions and stomach discomfort.
7. Other Causes
- Thyroid disorders (hyperthyroidism)
- Diabetes-related nerve damage
- Post-surgery changes in the digestive tract
- Celiac disease
- Colorectal cancer (in rare, chronic cases)
When Should You See a Doctor?
Most mild cases of diarrhea resolve within 1-2 days with rest and hydration. However, you must consult a doctor if you experience:
- Diarrhea lasting more than 2 days
- Blood or mucus in your stools
- Severe stomach pain or cramping
- High fever along with loose motions
- Signs of dehydration (dry mouth, dizziness, reduced urination)
- Unexplained weight loss
Do not ignore these warning signs. Early diagnosis can prevent serious complications.
How Is Diarrhea Diagnosed?
A gastroenterologist will typically recommend:
- Stool culture and microscopy
- Blood tests
- Colonoscopy or endoscopy (for chronic cases)
- Imaging tests if required
Proper diagnosis helps identify the exact causes of diarrhea and guide the right treatment plan.
Diarrhea Treatment in Gurgaon
Diarrhea treatment in Gurgaon has become more accessible with experienced specialists available at leading hospitals. Treatment typically includes:
- Oral Rehydration Solution (ORS) to prevent dehydration
- Antibiotics for bacterial or parasitic infections
- Probiotics to restore gut bacteria
- Dietary changes — avoiding dairy, spicy food, and raw vegetables temporarily
- Medication management for IBS or IBD
The treatment approach depends entirely on the underlying cause, which is why consulting a specialist is important.
Meet Dr. Mukesh Nandal – Best Doctor for Diarrhea Treatment in Gurgaon
If you are looking for the best doctor for diarrhea treatment in Gurgaon, Dr. Mukesh Nandal is a highly experienced and trusted name in digestive health.
Dr. Mukesh Nandal
MBBS | MD – Internal Medicine | DNB – Medical Gastroenterology
Senior Consultant at:
- Narayana Hospital, Gurgaon
- Atharva Gastro Clinic, Sector 10A, Gurgaon
With expertise in diagnosing and managing all types of digestive disorders – from acute infections to complex conditions like IBD and IBS – Dr. Nandal provides personalized, evidence-based care to every patient.
Simple Tips to Prevent Diarrhea
- Always drink clean, filtered, or boiled water
- Wash hands before eating and after using the toilet
- Avoid eating from unhygienic roadside stalls
- Refrigerate food properly and avoid reheating multiple times
- Take prescribed probiotics after antibiotic courses
- Eat a fibre-rich, balanced diet
Final Thoughts
Understanding the causes of diarrhea helps you take action faster and avoid unnecessary suffering. While many cases are mild and manageable at home, recurring or severe diarrhea should never be ignored.
If you or a family member is experiencing persistent digestive issues, reach out to a qualified gastroenterologist in Gurgaon like Dr. Mukesh Nandal for a thorough evaluation and the right treatment plan.
Disclaimer: This blog is written for informational purposes only and does not substitute professional medical advice. Please consult a qualified doctor for diagnosis and treatment.
Sources & References:
- World Health Organization (WHO) – Diarrhoeal Disease Fact Sheet
- Indian Council of Medical Research (ICMR) – Guidelines on Acute Diarrhea
- Mayo Clinic – Diarrhea: Causes and Risk Factors
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)