Introduction
Diarrhea COVID refers to loose or watery bowel movements that can occur during a COVID-19 infection. Although COVID-19 is best known for respiratory symptoms such as sore throat, cough, congestion, and breathing problems, the infection can also affect the digestive system. Some people with COVID-19 experience diarrhea, nausea, vomiting, stomach discomfort, or abdominal pain.
Diarrhea may occur alongside typical respiratory symptoms, but it can sometimes appear before other noticeable COVID-19 symptoms. Because diarrhea has many possible causes—including food poisoning, other viral infections, bacterial infections, medications, and digestive disorders—having diarrhea alone does not necessarily mean that someone has COVID-19.
Understanding the connection between COVID-19 and diarrhea can help you recognize symptoms, avoid dehydration, know how to manage mild illness at home, and recognize when medical attention is necessary.
Can COVID-19 Cause Diarrhea?
Yes. COVID-19 can cause gastrointestinal symptoms, including diarrhea. The virus responsible for COVID-19 can affect the digestive system as well as the respiratory tract.
People with COVID-19 may experience:
- Loose or watery stools
- Increased bowel movements
- Nausea
- Vomiting
- Abdominal discomfort
- Stomach cramps
- Reduced appetite
However, gastrointestinal symptoms vary from person to person. Some people have respiratory symptoms without digestive problems, while others may experience gastrointestinal symptoms during their illness.
Diarrhea is therefore considered a possible symptom of COVID-19, but it is not specific enough to diagnose the infection by itself.
What Does COVID-Related Diarrhea Feel Like?
COVID-related diarrhea can feel similar to diarrhea caused by other viral illnesses. You may notice that your stools become:
- Loose
- Watery
- More frequent than usual
- Urgent
- Accompanied by abdominal cramps
Some people may also experience nausea, vomiting, fatigue, fever, headache, sore throat, cough, or congestion.
The presence of diarrhea together with other symptoms can make COVID-19 more likely, but testing may be needed because many illnesses can produce similar symptoms.
Why Does COVID Cause Diarrhea?
COVID-19 is caused by SARS-CoV-2, a virus that primarily affects the respiratory system but can also affect other parts of the body.
The digestive tract contains cells that can interact with the virus, and infection may contribute to inflammation and changes in normal intestinal function. These changes can lead to gastrointestinal symptoms such as diarrhea, nausea, and abdominal discomfort.
The exact symptoms and severity can vary depending on factors such as the individual’s immune response, overall health, and the particular SARS-CoV-2 strain circulating at the time.
Is Diarrhea a Common COVID Symptom?
Diarrhea is a recognized COVID-19 symptom, but it is generally less prominent than some respiratory symptoms.
Current COVID-19 symptoms can include runny or stuffy nose, headache, sore throat, cough, tiredness, fever, muscle aches, nausea, vomiting, and diarrhea. The frequency and combination of symptoms can change as the virus evolves.
This means you should not use the presence or absence of diarrhea alone to determine whether you have COVID-19.
Can Diarrhea Be the Only Symptom of COVID?
It is possible for gastrointestinal symptoms to occur without obvious respiratory symptoms, particularly early in an infection. However, diarrhea by itself has many potential causes.
Common causes of acute diarrhea include:
- Viral infections
- Food poisoning
- Bacterial infections
- Parasites
- Medication side effects
- Dietary changes
- Food intolerance
- Stress
- Certain digestive disorders
COVID-19 is one possible viral cause. If diarrhea is accompanied by exposure to COVID-19, respiratory symptoms, fever, or other signs of infection, testing may be appropriate.
Diarrhea COVID Symptoms to Watch For
If diarrhea occurs during COVID-19, you may experience other symptoms at the same time.
Gastrointestinal Symptoms
These may include:
- Watery stools
- Frequent bowel movements
- Abdominal cramps
- Nausea
- Vomiting
- Loss of appetite
- Bloating
Respiratory Symptoms
COVID-19 may also cause:
- Sore throat
- Cough
- Runny nose
- Stuffy nose
- Shortness of breath
- Chest discomfort
General Symptoms
Other possible symptoms include:
- Fever or chills
- Headache
- Body aches
- Fatigue
- Weakness
The combination varies considerably between individuals.
How Long Does COVID Diarrhea Last?
There is no single duration that applies to everyone.
Mild diarrhea associated with a viral infection may improve as the infection resolves. However, the duration depends on the underlying cause, severity, hydration status, age, and general health.
If diarrhea continues for several days without improvement, becomes severe, or is accompanied by concerning symptoms, medical evaluation is appropriate.
For adults, Mayo Clinic recommends contacting a healthcare professional when diarrhea lasts more than two days without improvement, particularly when other warning signs are present.
Can Diarrhea Cause Dehydration During COVID?
Yes. Diarrhea causes the body to lose water and electrolytes. If diarrhea is frequent, dehydration can develop, especially when vomiting or fever is also present.
Possible signs of dehydration include:
- Excessive thirst
- Dry mouth
- Dry skin
- Dark-colored urine
- Urinating less often
- Weakness
- Fatigue
- Dizziness
- Lightheadedness
Severe dehydration can become dangerous and may require urgent medical treatment.
Children, older adults, and people with certain health conditions may be particularly vulnerable to complications from dehydration.
How to Treat Mild COVID Diarrhea at Home
For mild illness, the primary goal is to maintain hydration and allow the body to recover.
Drink Plenty of Fluids
Replace fluids lost through diarrhea by drinking regularly throughout the day.
Options may include:
- Water
- Oral rehydration solutions
- Broth
- Electrolyte-containing drinks
For significant fluid loss, oral rehydration solutions can be especially useful because they contain both fluids and electrolytes.
Mayo Clinic recommends replacing lost fluids and salts when managing diarrhea.
Take Small, Frequent Sips
If nausea makes drinking difficult, don’t force yourself to consume a large amount at once. Small, frequent sips may be easier to tolerate.
If you cannot keep fluids down or develop signs of significant dehydration, contact a healthcare professional.
Eat Simple Foods as Tolerated
You do not necessarily need to completely stop eating. Once your stomach allows it, try easy-to-digest foods such as:
- Rice
- Bananas
- Toast
- Crackers
- Oatmeal
- Soup
- Plain potatoes
As symptoms improve, gradually return to your normal diet.
Avoid Foods That May Worsen Diarrhea
While recovering, some people find that the following worsen symptoms:
- Alcohol
- Caffeine
- Very fatty foods
- Highly spicy foods
- Large amounts of dairy
- Very high-fiber meals
Mayo Clinic recommends avoiding certain foods and beverages that can aggravate diarrhea while symptoms are active.
Should You Take Anti-Diarrhea Medicine for COVID?
Some adults may use over-the-counter anti-diarrheal medications such as loperamide or bismuth subsalicylate to reduce diarrhea. However, these medicines are not appropriate for every situation.
You should be cautious if diarrhea is accompanied by:
- Blood in the stool
- High fever
- Severe abdominal pain
- Suspected bacterial infection
- Severe illness
Some anti-diarrheal medicines can be inappropriate in certain infections because slowing intestinal movement may interfere with the body’s ability to eliminate the underlying cause.
If you have an existing medical condition, take prescription medications, are pregnant, or are treating a child, ask a healthcare professional before using an anti-diarrheal medicine.
Do Antibiotics Treat COVID Diarrhea?
No. COVID-19 is caused by a virus, while antibiotics are designed to treat certain bacterial infections.
Antibiotics therefore do not treat COVID-19 itself. Unnecessary antibiotic use can also cause side effects, including antibiotic-associated diarrhea.
If a doctor suspects a separate bacterial infection, antibiotics may be prescribed for that specific infection. But they should not be taken simply because diarrhea occurs during COVID-19.
COVID Treatment for People at Higher Risk
Most people with mild COVID-19 recover at home with supportive care. However, some people have a higher risk of developing severe disease.
Depending on individual circumstances, healthcare professionals may recommend antiviral treatment such as:
- Nirmatrelvir-ritonavir (Paxlovid)
- Remdesivir
- Molnupiravir in appropriate situations
These treatments are intended for eligible people at higher risk of serious COVID-19 illness and need to be started within appropriate treatment windows.
If you have risk factors for severe COVID-19 and develop symptoms, contact your healthcare professional promptly rather than waiting for symptoms to become severe.
Can COVID Diarrhea Be Confused With Food Poisoning?
Yes. Food poisoning and COVID-19 can both cause gastrointestinal symptoms.
Food poisoning may be more likely when symptoms begin after eating contaminated food and include prominent vomiting, abdominal cramps, or diarrhea.
COVID-19 becomes more relevant when gastrointestinal symptoms occur with:
- Sore throat
- Cough
- Congestion
- Headache
- Fever
- Body aches
- Recent exposure to someone with COVID-19
However, symptoms overlap considerably, so testing and medical assessment may be necessary.
COVID Diarrhea vs. Stomach Flu
The term “stomach flu” is commonly used for viral gastroenteritis, but it isn’t actually influenza.
Viral gastroenteritis can cause:
- Diarrhea
- Vomiting
- Stomach cramps
- Nausea
- Fever
COVID-19 can cause similar digestive symptoms while also producing respiratory symptoms.
Because these conditions can look similar, it may not be possible to determine the cause based on symptoms alone.
Should You Test for COVID if You Have Diarrhea?
If diarrhea occurs together with symptoms associated with COVID-19 or you have recently been exposed to someone with COVID-19, testing can be useful.
Testing is especially relevant if you are at increased risk of severe disease because an early diagnosis may allow you to discuss antiviral treatment promptly.
Mayo Clinic recommends testing when you have symptoms of COVID-19.
How to Prevent Spreading COVID When You Have Diarrhea
If diarrhea is part of a COVID-19 infection, remember that you can still spread the virus even when gastrointestinal symptoms are more noticeable than respiratory symptoms.
Helpful measures include:
- Stay home while you’re sick.
- Avoid close contact with vulnerable people.
- Wash your hands regularly.
- Improve ventilation indoors.
- Cover coughs and sneezes.
- Clean frequently touched surfaces.
- Avoid sharing personal items.
- Follow current public-health recommendations.
Mayo Clinic recommends staying away from others when sick, practicing good hand hygiene, and improving airflow to reduce transmission.
When Should You See a Doctor for COVID Diarrhea?
Mild diarrhea often improves with hydration and supportive care. However, medical advice is important if symptoms become severe or persistent.
Contact a healthcare professional if:
- Diarrhea lasts more than two days without improvement.
- You cannot drink enough fluids.
- You are urinating very little.
- You become dizzy or extremely weak.
- You have severe abdominal pain.
- You have bloody or black stools.
- You develop a high fever.
- Symptoms are getting worse rather than better.
- You have a condition that increases your risk of severe COVID-19.
- You are concerned about dehydration.
Mayo Clinic identifies persistent diarrhea, dehydration, severe abdominal pain, bloody or black stools, and high fever as reasons for medical evaluation.
Emergency Warning Signs
Some COVID-19 symptoms require urgent medical attention.
Seek emergency care for symptoms such as:
- Severe difficulty breathing
- Persistent chest pain or pressure
- New confusion
- Inability to wake or stay awake
- Severe weakness
- Signs of serious dehydration
- Bluish, gray, or pale skin, lips, or nail beds depending on skin tone
Severe dehydration can also become an emergency, especially when fluid losses are substantial and the person cannot replace them by drinking.
Diarrhea COVID in Children
Children can also develop diarrhea during COVID-19. The most important concern is dehydration.
Parents should watch for:
- Dry mouth
- Few or no tears
- Reduced urination
- Unusual sleepiness
- Irritability
- Sunken eyes
- Difficulty drinking
- Persistent vomiting
Children can become dehydrated more quickly than adults. If a child has persistent diarrhea, signs of dehydration, bloody stool, high fever, or worsening symptoms, contact a pediatric healthcare professional promptly.
Diarrhea COVID in Older Adults
Older adults may be more vulnerable to dehydration and severe COVID-19 complications.
They may not always experience or communicate symptoms in the same way as younger adults. Weakness, confusion, reduced appetite, or decreased urination can be important warning signs.
Older adults with COVID-19 and significant diarrhea should be monitored carefully for dehydration and worsening illness.
Can Probiotics Help With COVID Diarrhea?
Probiotics are sometimes used to support digestive health, but evidence that they reliably shorten an episode of acute diarrhea is still limited.
Some probiotic products may be appropriate for certain people, but they should not replace fluid and electrolyte replacement.
For significant diarrhea, hydration remains the priority.
How to Recover After COVID Diarrhea
Once diarrhea begins improving, gradually return to your normal eating pattern.
Focus on:
- Adequate fluids
- Balanced meals
- Protein-rich foods as tolerated
- Fruits and vegetables as tolerated
- Adequate rest
- Gradual return to normal activity
If digestive symptoms continue long after the acute infection has resolved, discuss them with a healthcare professional. Persistent diarrhea may have causes unrelated to COVID-19 and may require further evaluation.
Conclusion
Diarrhea COVID is a possible gastrointestinal manifestation of COVID-19. Although COVID-19 primarily affects the respiratory system, some infected people experience diarrhea, nausea, vomiting, abdominal discomfort, or other digestive symptoms.
Because diarrhea has many possible causes, it should not automatically be assumed to be COVID-19. Testing may be useful when gastrointestinal symptoms occur with other COVID-19 symptoms or after a known exposure.
For mild cases, maintaining hydration, replacing electrolytes, resting, and eating easily tolerated foods can help support recovery. Anti-diarrheal medicines may be useful for some adults but are not appropriate in every situation.
People at higher risk of severe COVID-19 should contact a healthcare professional promptly because antiviral treatments may be available. Anyone experiencing severe dehydration, bloody or black stools, severe abdominal pain, breathing difficulty, chest pain, confusion, or other serious symptoms should seek urgent medical care.
Ultimately, paying attention to hydration and recognizing warning signs are two of the most important steps when diarrhea occurs during COVID-19.
FAQs About Diarrhea COVID
1. Can COVID-19 cause diarrhea?
Yes. COVID-19 can cause gastrointestinal symptoms such as diarrhea, nausea, vomiting, and abdominal discomfort.
2. Is diarrhea a common symptom of COVID?
Diarrhea is a recognized symptom, although respiratory symptoms such as sore throat, congestion, cough, and fatigue are more commonly reported. Symptoms can vary between people and over time.
3. Can diarrhea be the first sign of COVID?
Yes, gastrointestinal symptoms can occur early in COVID-19. However, diarrhea alone has many possible causes, so it cannot confirm COVID-19.
4. How long does COVID diarrhea last?
The duration varies. Mild diarrhea may improve as the infection resolves, but persistent diarrhea should be evaluated, particularly if it lasts more than two days without improvement or is accompanied by dehydration or other warning signs.
5. What should I drink for COVID diarrhea?
Water and fluids containing electrolytes can help replace fluids lost through diarrhea. Oral rehydration solutions can be particularly useful when fluid and electrolyte losses are significant.
6. Can I take Imodium for COVID diarrhea?
Some adults may use loperamide for diarrhea, but it isn’t appropriate for everyone.
7. Do antibiotics help COVID diarrhea?
No. Antibiotics do not treat COVID-19 because it is caused by a virus. They may be prescribed only when a healthcare professional identifies a separate bacterial infection.
8. Can COVID diarrhea cause dehydration?
Yes. Frequent diarrhea can cause loss of water and electrolytes. Excessive thirst, dry mouth, dark urine, reduced urination, dizziness, and weakness can indicate dehydration.
9. Should I test for COVID if I have diarrhea?
If diarrhea occurs with other COVID-19 symptoms or follows a known exposure, testing can help determine whether COVID-19 is the cause.
10. When should I see a doctor for diarrhea during COVID?
Seek medical advice if diarrhea persists, you become dehydrated, you have severe abdominal pain, bloody or black stools, a high fever, or worsening symptoms.
