When you throw up and have diarrhea at the same time it means that your body is rapidly trying to get rid of harmful germs, toxins or viruses like the stomach flu, which is often a result of viral gastroenteritis also known as the stomach flu or even food poisoning.
The most common cause of throwing up and having diarrhea at the same time is a result of the stomach flu also known as viral gastroenteritis, which causes inflammation from viruses like rotavirus or norovirus.
Food poisoning like from bacteria, E. coli or Salmonella or even their toxins in contaminated food can cause you to throw up and have diarrhea at the same time.
Other things that can cause you to throw up and have diarrhea at the same time include, bacterial and parasitic infections, like from contaminated food or water, which is known as traveler's diarrhea.
Medication side effects like from NSAIDs, chemo drugs and Antibiotics.
Stress and anxiety, which can cause hormonal response and affect your gut and lead to throwing up and diarrhea at the same time.
And even pregnancy could cause you to throw up and have diarrhea at the same time or even just throw up, like through morning sickness or hyperemesis gravidarum.
When your throwing up and having diarrhea at the same time, it's not always a cause for concern and most cases of throwing up and having diarrhea at the same time will go away on their own within a few days or so.
But if the throwing up and diarrhea continue longer than a few days or it gets worse or if you have blood in your vomit or poop then you should seek medical attention.
What you can and should do at home is stay hydrating by sipping small amounts of water, broth or electrolyte drinks like Pedialyte, sports drinks, coconut water etc.
Get plenty of rest and eat bland foods, when you can keep liquids down, you should try eating crackers, toast, rice or soup.
Avoid sugary foods and sugary drinks and also anti-diarrheal and anti-nausea medications unless a doctor improves as they can actually make some infections worse.