Why do I throw up after I eat?

In this brief guide, we will address the query, “why do I throw up after I eat?”. We will also talk about what can cause nausea after eating and what is food poisoning. Then, we will discuss that gastroparesis is and, also, if allergies can make you throw up after eating.

Why do I throw up after I eat?

This may happen for a number of different reasons from food poisoning, heart attack and brain tumor to ulcers, emotional stress and bulimia. It is hard to determine a reason to throw up after eating without analyzing the whole context. 

Things to consider when trying to understand why you are throwing up after eating is your age, the timing that it is happening, and also if you are diagnosed with any disease that may affect your digestive system.

Some of the conditions that can cause nausea and consequently vomiting after eating include:

  • Pregnancy;
  • High levels of pain;
  • Overeating;
  • Psychological disorders such as bulimia and anorexia;
  • Excessive ingestion of alcohol;
  • Appendicitis;
  • Bowel obstruction;

There are too many diseases and conditions that can cause nausea and vomiting. That’s why you should search for medical advice if this happens too often.

In this short review we will briefly talk about some of these conditions, but it is impossible to encompass everything regarding vomiting after eating in just one blog, this would give us a really long text to read!

What can cause nausea after eating?

Most likely, food poisoning, gastritis or food allergy will cause nausea after eating. As mentioned above, there are several reasons why you may feel nauseous. Before determining what it is, it’s important to take into account other factors.

Children, for example, are very often ill due to viral and bacterial infections since their immune systems are just starting to be built. It’s not rare that they have diarrhea and also vomiting episodes along with fever, blocked intestines and other gastrointestinal symptoms.

What is food poisoning?

Food poisoning is what you get when you eat contaminated food. It is not something to really worry about as you may feel better in just a few days, but it can cause nausea, vomiting and, sometimes, fever.

When eating food contaminated with harmful bacteria or viruses, your digestive system will complain, and that complaint will come in the form of diarrhea, vomiting, abdominal pain, chills and other symptoms.

There is nothing special to do except rest in your bed and drink a lot of water to prevent dehydration. Some medication can help ease the symptoms, however, if they persist after several days, you should look for medical care. 

What is gastroparesis?

It is a condition in which the person has a stomach that empties very slowly. This is often a consequence of a damaged vagus nerve, responsible for the stomach contractions during digestion.

Gastroparesis is really rare and is normally related to diseases such as autoimmune diseases, diabetes, infection, neuromuscular diseases and diabetes. Eating disorders may also cause gastroparesis.

This condition doesn’t have a cure yet, but there are medications that can help ease the symptoms and also alternative treatments, like:

  • Diet changes: Eating small portions of food in more frequent meals can attenuate the symptoms. But in more severe cases, people often choose to go on an all-liquid diet.
  • Jejunostomy: This is a pretty word for tube feeding and is an option for severe cases of gastroparesis. The tube, surgically implanted, crosses the stomach and delivers food to the small bowel directly.

Can allergies make you throw up after eating?

Allergies can definitely make you throw up after eating, principally if you have any food allergy. This happens as a reaction to the contact with the allergen, and vomiting or nausea are the most common and mild consequences.

Still, food allergies are not the only cause for vomiting. Other types of allergies can also lead to this reaction. 

When your immune system encounters an allergen, it starts a chain reaction, liberating a substance called histamine, which can cause several symptoms depending on where the contact between the allergen and your body was. They include:

  • Headache, sneezing and rash are common symptoms when talking about respiratory tract allergies;
  • Nausea, vomiting and diarrhea are common symptoms when talking about food allergies.


In this brief guide, we addressed the query, “why do I throw up after I eat?”. We also talked about what can cause nausea after eating and what is food poisoning. We then discussed what gastroparesis is and if allergies can make you throw up after eating.

Likewise, we hope that this guide was useful to you! If you have any doubts, don’t hesitate to contact us!





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