diarrhea treatment options overview
Informed by recognized medical guidance
Overview
Diarrhea means passing loose or watery stools three or more times in a day. It is often the body’s way of getting rid of an infection or irritation in the digestive system.
Key facts
- Most diarrhea clears up on its own within a few days without special treatment.
- The biggest risk is losing too much fluid, so drinking enough is key.
- Diarrhea can be caused by viruses, bacteria, certain medicines, or ongoing digestive conditions.
Diarrhea is very common. Most adults experience it once or twice a year, and children can have it more often.
Diarrhea can affect people of all ages, but it can be more serious in infants, young children, older adults, and people with weakened immune systems.
Symptoms
- Blood or black tar-like stool
- Severe stomach pain that does not go away
- Very high fever
- Signs of severe dehydration, such as fainting, a racing heart, or almost no urination
- ⚠Diarrhea lasting more than 2 days in adults or 24 hours in children
- ⚠Mild dehydration signs like dry mouth, dizziness, or less urination than usual
- ⚠Ongoing vomiting that prevents keeping fluids down
- ⚠You have a weakened immune system or a long-term medical condition
Common symptoms
- Loose, watery stools more often than usual
- Belly cramps or pain
- A sudden need to use the toilet
- Feeling sick to your stomach (nausea)
- Sometimes feeling tired or weak
Symptoms in children
- Loose or watery stools more often than normal
- Fever
- Vomiting
- Signs of dehydration, such as a dry mouth, fewer wet nappies or toilet trips, and crying with few or no tears
Symptoms in older adults
- Loose or watery stools
- Dizziness or lightheadedness
- Confusion or unusual sleepiness
- Weakness or feeling unsteady
- Dry mouth or sunken eyes
Causes
Main causes
- Viral infections, such as viruses that cause stomach bugs
- Bacterial infections from contaminated food or water
- Food poisoning
- Certain medicines, such as some antibiotics or laxatives
- Digestive conditions like irritable bowel syndrome (IBS) or inflammatory bowel disease (IBD)
Risk factors
- Traveling to areas where water and food may be unsafe
- Not washing your hands well, especially after using the toilet
- Having a weakened immune system
- Taking antibiotics or other medicines that affect the stomach
When to see a doctor
See a doctor urgently if:
- Diarrhea that lasts more than a few days
- Signs of dehydration, even mild ones
- Blood in the stool or black, tarry stool
- High fever, severe belly pain, or repeated vomiting
- Diarrhea in a baby, young child, or older adult that does not improve quickly
Book a routine appointment if:
- You have diarrhea that keeps coming back
- You also have an ongoing health condition like diabetes or kidney disease
- You recently took antibiotics and the diarrhea began after that
- You are traveling and need advice on what to do
Diagnosis
A doctor will usually ask about your symptoms, recent travel, and any medicines you take. They may also do a quick physical exam to check for signs of dehydration.
Tests that may be done
- A stool test to check for bacteria, viruses, or parasites
- A blood test to look for infection or signs of dehydration
- A hydrogen breath test if a digestion problem like lactose intolerance is suspected
- A look inside the bowel (sigmoidoscopy or colonoscopy) if diarrhea is long-lasting
What to expect at your appointment
The doctor may recommend tests based on how long the diarrhea lasts, how severe it is, and your overall health. Often no tests are needed for short-term diarrhea.
Treatment
The main treatment is to replace lost fluids and prevent dehydration. Most people get better with rest and home care. Medicines for diarrhea are not always needed and should only be used after talking with a doctor.
Self-care at home
- Drink plenty of clear fluids, like water, diluted juice, or a pharmacy-bought rehydration solution
- Sip fluids often rather than drinking large amounts at once
- Eat small, bland meals when your appetite returns, such as plain rice, bananas, toast, or crackers
- Rest and stay at home to avoid spreading an infection
- Wash your hands carefully after using the toilet
Medical treatments
Doctors may sometimes recommend a medicine to reduce how often you go to the toilet, but this is not suitable for everyone — especially children or people with a high fever or blood in the stool. If a bacterial infection is confirmed, a doctor may prescribe an antibiotic, but this is only for specific situations. Always ask your doctor or pharmacist about what is safe for you.
When is surgery considered?
Surgery is rarely needed for diarrhea. It may only be required if the diarrhea is caused by a surgical problem, such as appendicitis or a blocked bowel.
Living with this condition
Stay close to a toilet while your symptoms last. Keep a bottle of water nearby and sip drinks throughout the day. Let family or friends know so they can help if you become dizzy or weak.
Lifestyle tips
- Wash your hands with soap after using the toilet and before touching food
- Avoid preparing food for others until your diarrhea has stopped for at least 48 hours
- Do not share towels or utensils while you are unwell
- Clean toilet seats and handles often to protect others
Diet and exercise
Eat small, bland meals and drink fluids regularly. Avoid greasy, spicy, or very sweet foods, as well as alcohol and caffeine, until you feel better. Gentle movement like walking is okay if you feel up to it, but rest is more important at first.
Mental health and emotional wellbeing
Diarrhea can be embarrassing or worrying, especially if you are away from home or at work. It is normal to feel anxious about not finding a toilet. Talk to your doctor if this anxiety continues after the diarrhea has cleared.
Prevention
You cannot always prevent diarrhea, but you can lower the risk by washing your hands well, preparing food safely, and being careful with water and ice when traveling to places with poor sanitation.
Vaccines
There are vaccines for some causes of diarrhea, like rotavirus, which mainly affects children. In some countries, there is also a vaccine for cholera. Ask your doctor about what vaccines are right for you or your child.
Screening programmes
Screening is not usually needed for diarrhea. If you have symptoms that last for weeks or keep returning, a doctor may suggest tests to check for an underlying condition.
Complications
If left untreated
- Dehydration, which means your body does not have enough water to work properly
- An imbalance of important minerals called electrolytes
- Malnutrition or weight loss if diarrhea continues for a long time
- Kidney problems in severe cases
Long-term outlook
For most people, diarrhea improves within a few days with rest and fluids. Even if it takes longer to get better, treatment works well. You should be back to your normal routine soon, and there are effective ways to manage any long-term issues.
Find support
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
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Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 31, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.