Vomiting and diarrhea can happen at the same time for a number of reasons.

    A stomach virus or bacterial gastrointestinal (GI) infection is the most likely cause in children.

    These infections can affect adults as well. But there are a number of other reasons why an adult may experience these symptoms simultaneously, such as drinking too much alcohol or being pregnant.

    1. Viral gastroenteritis

    Viral gastroenteritis is an intestinal infection. Viral gastroenteritis is often referred to as the stomach flu, but it’s unrelated to influenza (the flu) and is caused by different viruses.

    The viruses that most commonly cause gastroenteritis include:

    • norovirus
    • rotavirus
    • adenovirus
    • astrovirus

    While all of these viruses can affect people of any age, the latter three are most common in infants and toddlers, according to the National Institute of Diabetes and Digestive and Kidney Diseases .

    These viruses are transmitted from person to person by contact with infected stool and vomit. This can happen when a person with the infection doesn’t wash their hands thoroughly after using the restroom and then touches surfaces used by other people or prepares food for others.

    In addition to vomiting and watery diarrhea , symptoms of viral gastroenteritis include:

    • abdominal pain and cramping
    • nausea
    • fever , on occasion
    Did you know?

    There are several types of irritable bowel syndrome (IBS) .

    One type is known as post-infectious irritable bowel syndrome (PI-IBS). PI-IBS is caused by an infection (usually gastroenteritis).

    One large survey , published in 2018, asked thousands of people with IBS about their experiences. Data was collected between 2008 and 2015. Respondents came from countries around the world, with almost half of them being Italian.

    The researchers found that infection may have caused IBS in 13.3 percent of respondents. According to the researchers, this statistic was in line with previous surveys, where PI-IBS was reported to comprise 6 to 17 percent of IBS cases.

    2. Food poisoning

    Food poisoning is an infection of the GI tract. It’s most often caused by bacteria but can also be caused by parasites or viruses.

    You can get food poisoning by eating contaminated food. This can happen at home or in restaurants when food is handled incorrectly or not cooked properly.

    Several bacteria can cause food poisoning, including:

    • E. coli
    • Campylobacter
    • Listeria monocytogenes
    • Salmonella
    • Shigella
    • Staphylococcus aureus

    Symptoms of food poisoning can start within hours of eating contaminated food and often resolve within a few hours to a few days. This usually happens without special treatment.

    Vomiting and watery diarrhea are the most common symptoms. Other symptoms include:

    • abdominal pain and cramping
    • nausea
    • fever
    • bloody diarrhea

    3. Traveler’s diarrhea

    Traveler’s diarrhea is a digestive tract disorder that’s most often caused by viruses, parasites, or bacteria consumed in water or food. It’s most likely to occur when you’re visiting an area with a different climate or sanitation practices than what you’re accustomed to at home.

    To see if there’s a health notice for the regions to which you’ve recently traveled, check the website of the Centers for Disease Control and Prevention (CDC) .

    Traveler’s diarrhea generally clears up within 1 week . Watery diarrhea and cramps are the most common symptoms, but traveler’s diarrhea can also cause:

    • nausea
    • fever
    • flatulence (gas)
    • bloating
    • tenesmus , or the urgent need to have a bowel movement

    4. Stress or anxiety

    Research shows that gastrointestinal function is influenced by stress, and that stress and anxiety commonly cause a number of gastrointestinal symptoms, including:

    • nausea
    • constipation
    • indigestion
    • heartburn

    The stress hormones released by your body slow motility, or movement, in your stomach and small intestine. They also trigger an increase in motility in your large intestine.

    Stress and anxiety have also been linked to the development and worsening of irritable bowel syndrome (IBS) as well as inflammatory bowel disease (IBD) .

    5. Pregnancy

    The body goes through numerous changes during pregnancy.

    Morning sickness is the most common cause of vomiting in pregnancy. Despite its name, morning sickness can occur at any time of the day . It affects almost 75 percent of pregnant women, usually during the first 14 weeks of pregnancy.

    Some people develop hyperemesis gravidarum , a condition that causes severe nausea and vomiting.

    Vomiting and diarrhea in pregnancy can be caused by hormonal changes , new food sensitivities , and dietary changes. Prenatal vitamins also cause diarrhea in some people.

    These symptoms can also be caused by gastroenteritis, which is common during pregnancy.

    6. Overeating or overdrinking

    Overindulging in food or drink can cause vomiting and diarrhea along with:

    • indigestion
    • heartburn
    • belching
    • a feeling of uncomfortable fullness

    The type of food you eat also matters. Eating large amounts of greasy or sugary foods can irritate your stomach and cause vomiting and diarrhea.

    Overeating is even more likely to cause these symptoms if you already have a gastrointestinal condition, such as IBS, stomach ulcers , acid reflux , or gastroesophageal reflux disease (GERD).

    The relationship between alcohol and the gut is complex. Some types of alcohol, including sugary drinks, can cause diarrhea by inducing a quicker gut transit time. This decreases digestion, as the gut doesn’t have time to absorb the nutrients or other substances that are rapidly passing through it.

    Excessive alcohol use can cause a condition known as alcoholic gastritis, which is an irritation of the stomach lining. Acute gastritis can occur after binge drinking, or gastritis can become chronic in people who drink alcohol regularly.

    Gastritis can cause:

    • upper abdominal pain or burning
    • nausea
    • bloating
    • regurgitation
    • symptoms that improve or worsen after eating, depending on the food

    7. Medications

    Vomiting and diarrhea are side effects of many medications. Some are more likely to cause these symptoms than others. This can be because of the way the medication works or because they contain additives that irritate the stomach.

    Your age, overall health, and other medications can also increase the risk of side effects.

    Medications that commonly cause vomiting and diarrhea include:

    • certain antibiotics
    • nonsteroidal anti-inflammatory drugs (NSAIDS) , such as ibuprofen (Advil, Motrin) and aspirin
    • chemotherapy drugs
    • metformin (Fortamet, Glumetza)

    One way antibiotics can cause vomiting and diarrhea is by killing the “good” bacteria that normally lives in your GI tract. This allows bacteria called Clostridioides difficile to become overgrown, which can result in symptoms similar to severe food poisoning.

    Taking medication with food can sometimes relieve symptoms. Speak with a doctor about the best way to take your medication.

    Vomiting and diarrhea that occur without a fever can be caused by:

    • stress and anxiety
    • pregnancy
    • medications
    • consuming too much food or alcohol

    Mild cases of viral gastroenteritis can also cause vomiting and diarrhea without fever.

    Dehydration is a complication of vomiting and diarrhea, and it occurs when the body loses too much fluid. Dehydration can prevent your cells, tissues, and organs from functioning properly, leading to serious complications, including shock and even death.

    Mild dehydration can be treated at home, but severe dehydration requires emergency care in a hospital.

    Symptoms of dehydration in babies , toddlers, and children include:

    • thirst
    • urinating less than usual, or going 3 or more hours without a wet diaper
    • dry mouth
    • sunken eyes or cheeks
    • decreased skin turgor , or elasticity
    • lack of energy
    • no tears when crying

    Symptoms in adults include:

    • extreme thirst
    • urinating less than usual
    • dry mouth
    • sunken eyes or cheeks
    • decreased skin turgor
    • fatigue
    • lightheadedness
    • dark-colored urine

    Most of the time, vomiting and diarrhea will resolve within a few days without treatment. Home remedies and medications can help you manage your symptoms and avoid dehydration.

    Home remedies

    Here are some ways you can treat vomiting and diarrhea at home to avoid dehydration:

    • Get plenty of rest.
    • Avoid stress.
    • Wash your hands with soap and water frequently.
    • Drink lots of clear fluids like water, broth, clear sodas, and sports drinks.
    • Eat saltine crackers.
    • Follow the BRAT diet , which consists of bland foods. BRAT stands for bananas, rice, applesauce, and toast.
    • Avoid foods that are greasy, spicy, or high in fat and sugar.
    • Avoid dairy.
    • Avoid caffeine.

    Follow this advice if you have babies or toddlers:

    • Give your baby smaller feedings more often if needed.
    • Give sips of water between formula or solid food.
    • Give them an oral rehydration solution, such as Pedialyte .

    Medications

    There are over-the-counter (OTC) and prescription medications available for vomiting and diarrhea. While generally safe for adults, OTC medications should not be taken without first consulting a doctor.

    OTC medications include:

    • bismuth subsalicylate ( Pepto-Bismol , Kaopectate)
    • loperamide ( Imodium )
    • antiemetic drugs , such as Dramamine and Gravol, which often contain the ingredient dimenhydrinate

    A doctor may recommend antibiotics to treat vomiting and diarrhea caused by bacterial infections, such as food poisoning.

    When you’re experiencing vomiting and diarrhea, your aim should be to get some sustenance and avoid dehydration.

    If an infection like gastroenteritis is causing your symptoms, start by trying home remedies. In other cases, professional medical care may be required.

    For children

    Take a child to the doctor if they:

    • are vomiting for more than 2 days or have diarrhea for more than 7 days
    • are unable to keep fluid down
    • are under 3 months old with a rectal temperature of 100.4°F (38°C)
    • are 3 months to 3 years old with a temperature of 102.2°F (39°C)
    • are under 5 years old and appear to have symptoms of dehydration, such as:
      • dry mucous membranes
      • drowsiness
      • irritability that doesn’t go away when they’re consoled

    It’s especially important to contact a doctor about possible dehydration if the child is too young to describe their own symptoms.

    For adults

    See a doctor if:

    • you’re still dehydrated after rehydrating with fluids and an oral hydration solution
    • you are vomiting for more than 2 days or have diarrhea for more than 7 days
    • your vomit is green or yellow , which can be a symptom of small bowel obstruction
    • you’re vomiting blood or what looks like coffee grounds
    • you have bloody diarrhea or rectal bleeding
    • you’re unable to keep fluid down

    Most of the time, vomiting and diarrhea are due to a stomach bug or food poisoning and clear up on their own within a few days. Getting plenty of fluids and eating a bland diet can help.

    Keep an eye out for signs of dehydration, especially in infants and toddlers who are not able to communicate what they’re feeling. Talk with a doctor if you have, or your child has, severe symptoms or symptoms that last more than a few days.

    What comes first vomiting or diarrhea?
    Nausea and vomiting Often lack of appetite or nausea is the first sign of stomach flu, with vomiting usually following soon after and diarrhea after that. Vomiting typically stops before diarrhea, and you may recover your appetite quickly. more
    How long is vomiting and diarrhea contagious?
    Diarrhoea and vomiting can spread easily Stay off school or work until you've not been sick or had diarrhoea for at least 2 days. more
    Can diarrhea cause vomiting?
    Viral gastroenteritis is an intestinal infection that includes signs and symptoms such as watery diarrhea, stomach cramps, nausea or vomiting, and sometimes fever. more
    What causes sudden vomiting and diarrhea?
    Vomiting and diarrhea can be caused by a number of things. These include viruses, bacteria, parasites, certain medicines, or certain medical conditions. Foods that are hard to digest (such as too many sweets) and undercooked (raw or partially raw) meat or fish can also cause vomiting and diarrhea. more
    Does diarrhea or vomiting come first?
    Often lack of appetite or nausea is the first sign of stomach flu, with vomiting usually following soon after and diarrhea after that. Vomiting typically stops before diarrhea, and you may recover your appetite quickly. more
    Does vomiting or diarrhea come first?
    Often lack of appetite or nausea is the first sign of stomach flu, with vomiting usually following soon after and diarrhea after that. Vomiting typically stops before diarrhea, and you may recover your appetite quickly. more
    What causes diarrhea without vomiting?
    Short-term diarrhoea Diarrhoea is usually a symptom of a bowel infection (gastroenteritis), which can be caused by: a virus – such as norovirus or rotavirus. bacteria – such as campylobacter, Clostridium difficile (C. difficile), Escherichia coli (E. more
    What causes violent vomiting and diarrhea?
    Vomiting and diarrhea can be caused by a number of things. These include viruses, bacteria, parasites, certain medicines, or certain medical conditions. Foods that are hard to digest (such as too many sweets) and undercooked (raw or partially raw) meat or fish can also cause vomiting and diarrhea. more
    What helps with diarrhea and vomiting?
    Vomiting and diarrhea treatment
    1. Get plenty of rest.
    2. Avoid stress.
    3. Wash your hands with soap and water frequently.
    4. Drink lots of clear fluids like water, broth, clear sodas, and sports drinks.
    5. Eat saltine crackers.
    6. Follow the BRAT diet, which consists of bland foods.
    more
    What causes vomiting but no diarrhea?
    Vomiting alone (without diarrhea) should stop within about 24 hours. If it lasts over 24 hours, you must think about more serious causes. Examples are appendicitis, a kidney infection, diabetes and head injury. more
    What is diarrhea and vomiting?
    Vomiting is the forceful emptying (throwing up) of what is in the stomach. It's normal for nausea (upset stomach) to come before each bout of vomiting. Diarrhea means 3 or more watery or very loose stools. more

    Source: www.healthline.com

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