Have you ever felt a strange feeling in your stomach, nausea, and a feeling of being sick? Or have you ever heard someone at home say, “I have a stomach flu, it’s so bad”? Many people also call this the “stomach flu .” What exactly is this? Today, we will talk about this in detail, very simply.
What is this "stomach flu" or "viral gastroenteritis"?
Simply put, this is an infection of your stomach and intestines (bowel) caused by a virus. We call this in medical terms `(Viral Gastroenteritis)` . If you look at the meaning of that word, “Gastro” means stomach. “Enter” means small intestine. “-itis” means inflammation, which means swelling, redness, and pain. So this is inflammation of the stomach and intestines caused by a virus.
Think about it, just like our throats get sore from a virus, what's happening in the stomach is the same thing.
Often, you may experience symptoms like diarrhea , stomach cramps, and nausea . Some people also call it “stomach flu.” However, it is not always caused by a virus, and sometimes it can be caused by bacteria or parasites. However, the symptoms are very similar. It can be difficult to tell for sure whether you have a virus or not.
Why is it called "Stomach Flu"? Is it really a "flu"?
This is a bit of a confusing issue. Although it is called “stomach flu,” it has nothing to do with the “flu” we know, which is the common cold caused by the influenza virus . They are both caused by two completely different types of viruses. And they both affect two different systems in the body. While the common cold affects our respiratory system, this “stomach flu” affects the digestive system.
So how the name “stomach flu” came about is not clear. It may be because both are prevalent at the same time, especially during “flu season.” Just as saying “I have the flu” means “I am sick ,” saying “stomach flu” may mean “I am sick , and it is a stomach ache.” Since these stomach upsets are often caused by a virus, “stomach flu” is a good guess.
How common is this “stomach flu”?
This condition called `(Viral Gastroenteritis)` is actually very common all over the world. But it's hard to say exactly how many people get it each year. Because there are many types of viruses that cause it, and many people don't get tested for it. According to experts, the main cause of this is the virus called `(Norovirus)` , which infects about 685 million people each year! Imagine that number.
What are these "stomach flu" symptoms?
Most often you will see these symptoms:
- Diarrhea (poor stool): Watery, frequent bowel movements.
- Nausea and vomiting: Feeling sick to your stomach and vomiting.
- Anorexia: Loss of appetite.
- Abdominal pain and cramping: A squeezing pain in the abdomen.
These symptoms are caused by inflammation in your stomach and intestines (the small intestine and sometimes the large intestine). This inflammation occurs when your immune system fights the virus.
But if your infection is more severe, or if your immune system overreacts, you may also experience what are called systemic symptoms . These are caused by inflammation in other systems of the body, outside of your digestive system. This is the next level of the immune system's response to the virus.
These systemic symptoms are:
- Fever: Feeling hot.
- Feeling cold and shivering (Chills).
- Fatigue.
- Body aches.
- Headache.
- Swollen lymph nodes: In places like the neck and armpits.
How does it feel when you start having the “stomach flu”?
For many people, these symptoms start suddenly, without them even knowing where they came from. Sometimes, you may vomit several times on the first day or two. These symptoms appear within a day or two after the virus enters the body. But the good news is that these symptoms disappear as quickly as they came, within a day or two.
What are the stages of "stomach flu"?
There are several main stages of this infection:
1. Exposure: You are most likely to catch this virus from someone in your community, especially someone in a closed environment like a school, nursing home, or ship. Because it takes a while for symptoms to appear, you may not hear about it until after you have been exposed to the virus.
2. Incubation period: After you are infected with the virus, it begins to multiply inside your body. This is called the incubation period. You will not develop symptoms until the virus has multiplied enough for your immune system to recognize it. This usually takes a few days, depending on the type of virus.
3. Acute infection: `(Viral Gastroenteritis)` is an acute infection, meaning it starts suddenly and ends in a short time. When your immune system recognizes this threat, it starts an inflammatory response to kill the virus. This is what causes the symptoms. When the immune system wins this battle, the symptoms stop.
4. Recovery phase: As your immune system fights off the virus, you will begin to feel less sick. Eventually, your symptoms will go away completely and you will feel better. However, you may still shed the virus in your stool for a few more days. This means you are still contagious.
How long does the “stomach flu” last?
This usually gets better in a few days. However, in severe cases, it can take a week or two. It can take longer because people with weakened immune systems have a harder time fighting the virus.
Is “stomach flu” contagious? How long can it be contagious?
Yes, this is a very contagious disease. If you have it, you should limit your contact with others as much as possible. If you live with other people, you should wash your hands frequently and disinfect the things you use, especially the bathroom.
You are most contagious during the acute phase of your symptoms and for a few days afterward. However, you can still be slightly contagious for up to two weeks after you recover.
What causes “stomach flu”?
There are different types of viruses that can infect your digestive system and cause gastroenteritis.
The most important of them are:
- Norovirus: This is the leading cause of "stomach flu" in adults. It is responsible for about 50% of cases worldwide. This virus is more resistant to heat and disinfectants than others.
- Rotavirus: This is the leading cause of "stomach flu" in children worldwide. Since most people get it before the age of 3, most adults have immunity to it. There is now a vaccine for it.
- Astrovirus: This most often affects children under 3 years of age. It is most commonly spread through daycare centers. However, it can also spread through nursing homes.
- Adenovirus: These most often cause respiratory infections, but can also cause digestive tract infections if accidentally ingested. They affect people of all ages.
How does “stomach flu” spread?
It is usually spread by the “fecal-to-oral route.” This means that the virus lives in the feces (and vomit) of an infected person. Tiny amounts of this feces or vomit (too small to see) can end up on people’s hands and on objects they use. This can end up in food and water. You can get the virus from eating contaminated food and water, or by touching an infected person or something they have touched and then touching your mouth.
Just think, it's like when you were a child, you get sick after playing and eating food without washing your hands.
Who is more likely to get "stomach flu"?
Anyone can get it, but some people are more susceptible. If your immune system is weaker than normal, you are more likely to get an infection, or if you do get one, it will be more severe.
If you have a chronic illness that can weaken your immune system, or if you are taking medications that suppress your immune system. Also, young children and the elderly are more susceptible to infections.
What are the possible complications of "stomach flu"?
For most people, this is something that resolves on its own without complications. However, in those with weakened immune systems, the infection can be severe and complications can occur.
The most likely complication is dehydration, which is when too much fluid and electrolytes are lost from the body through diarrhea or vomiting and cannot be replaced.
People with weakened immune systems (especially children) are more likely to develop dehydration, which can be very dangerous for them. Watch out for the signs of dehydration:
- Intense thirst.
- No urination or dark-colored urine.
- No bowel movements or hard, dry stools.
- Weakness or lethargy.
- A sunken appearance.
- Crying without tears (of children).
- Headache caused by dehydration.
- Dry lips and tongue.
How do doctors diagnose "stomach flu"?
Most of the time, doctors diagnose gastroenteritis based on your symptoms. To know for sure if it's a virus, and what kind, you need to do a lab test. But most of the time, that's not necessary. Since there's no specific medicine for "stomach flu," there's not much point in diagnosing it.
How to cure "stomach flu" quickly?
Your immune system is the one that will heal this. It will take a few days. The uncomfortable symptoms you are having are actually a sign that your immune system is working. There is no specific medicine for the “stomach flu.” Antibiotics don’t work on viruses – they are given for bacterial infections.
The best thing you can do to help your immune system is to stay home, rest, drink plenty of fluids, and eat a healthy diet if possible. Give your body the energy it needs to fight the infection. Avoid dehydration, and drink small amounts of water throughout the day, or suck on ice cubes, rather than waiting until you are thirsty.
Are there things that help you recover from the "stomach flu" quickly?
Some research has shown that taking probiotics can help you recover from a stomach bug faster. Probiotics are a type of good bacteria that live in your digestive system. Having enough good bacteria in your gut is part of a healthy immune system. Ask your doctor about this.
What should you eat when you have the stomach flu?
What you eat won't make your stomach upset better, but it can make it worse. Foods that are high in fat, sugar, caffeine, and dairy can increase your risk of vomiting and diarrhea. You may have a loss of appetite and feel nauseous just thinking about food. Focus on foods that are easy to digest and provide quick energy. Fruit juices, ice packs, soups, and saltine crackers are good. Salt also helps replenish your electrolytes.
Do doctors treat severe symptoms or complications?
Doctors can give you intravenous fluids (saline) to treat dehydration. This gives you fluids directly into your bloodstream, bypassing your digestive system. In some cases, doctors may prescribe medication to reduce vomiting or diarrhea. But these are not usually given to children.
When should you see a doctor about "stomach flu"?
See a doctor in the following cases:
- If symptoms persist after four days.
- If you have a high fever (over 102 Fahrenheit/39 Celsius) for four days.
- If there is no urine or stool for two days.
- If you suspect dehydration.
- If there is blood in the stool.
- If you have severe stomach pain.
How to prevent “stomach flu”?
You can reduce your risk of getting the “stomach flu” and spreading it to others by following good hygiene practices. These include:
- Hand washing: Washing your hands thoroughly is the most important way to protect yourself from the "stomach flu" virus. Hand sanitizers don't always kill these viruses. You should definitely wash your hands after using the bathroom, changing diapers for young children, and before handling food.
- Cleanliness: Wash and disinfect all surfaces and objects that you or the infected person has touched. Use bleach and water (up to 25 tablespoons of bleach per gallon of water) to disinfect areas like bathrooms. Wash bedding and clothing in the washing machine on high heat.
- Safe food preparation: Food can contain “stomach flu” viruses, bacteria, or other organisms. Safe food preparation can reduce this risk. People who already have “stomach flu” should avoid preparing food for others as much as possible.
When will I feel better? When can I go back to work/school?
Most people get better in a few days. If they don't get better, see a doctor. People with weakened immune systems may need treatment for dehydration or medication to reduce symptoms. If you don't get better, you may have another medical condition.
It's best to stay away from others for a couple of days after your symptoms have stopped. This is when you're most contagious. Even if your body has cleared the infection, you'll still be shedding the virus in your stool. If even a little bit of that stool gets on someone else's body, they could get sick too.
What is the difference between "stomach flu" and regular "flu" (influenza)?
“Stomach flu” is not related to the “flu” we know, which is a respiratory infection caused by the influenza virus. The flu vaccine will not protect you from “stomach flu.” The two are caused by completely different viruses, and they affect different systems in the body. The symptoms are very different, but some of the symptoms can be seen in both.
`(Influenza)` (flu) causes respiratory symptoms such as runny nose, sore throat, and cough . ``Stomach flu'' causes digestive symptoms such as diarrhea, nausea, and vomiting. Both can cause ``systemic symptoms'' such as fever and fatigue. Children may show some digestive symptoms with both.
What do you mean by "flu-like symptoms"?
People may mean different things by this. They may be referring to ``Influenza'' symptoms. Or they may be referring to the systemic symptoms that are common in viral infections. Some people may also include digestive symptoms.
What is the difference between "stomach flu" and "food poisoning"?
“Stomach flu” and “food poisoning” are both infections that cause gastroenteritis, with similar symptoms. The two names refer to the source of the infection. Viral Gastroenteritis is caused by a virus. Food poisoning is caused by eating food that is dirty, contaminated with a virus, or something else.
If you get a virus from food, it could be a “stomach flu” caused by food poisoning. This is common, and in some cases, both describe the same condition. But food poisoning can also be caused by other things, such as bacteria. Bacterial food poisoning has a few differences from “stomach flu.”
Finally, things to remember (Take-Home Message)
Most people get the “stomach flu” at some point in their lives. Because there are many types of viruses that cause it, you can get it more than once. Children in daycare centers, schools, and nursing homes are especially susceptible, and their symptoms can be severe.
For most people, the “stomach flu” is an unpleasant, but short-lived experience. But for some, it can be dangerous.
If you are caring for a young child or an elderly person with the “stomach flu,” be vigilant for signs of dehydration and stay in touch with a doctor. Take steps to protect yourself from the virus and prevent spreading it to others. Remember, simple things like washing your hands can make a big difference. Stay healthy!
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