getting hot and nauseous after eating

Written by Dr.Bayat
Associate Professor of Orthopedic expert,Brigham Hostpital


Does the feeling of nausea bother you after eating? If you often feel hot and nauseous after eating, we recommend that you read on. In this article, we will explain why some people experience nausea after eating. Most people experience nausea after consuming large amounts of food in one meal.

Doctors consider a variety of causes for nausea after eating, which we will mention throughout the article.

The severity of your nausea after eating may be mild or very severe and painful.

In this article, we have gathered everything you need to know about the causes and management of nausea after eating.



Generally, any disorder that occurs in the normal functioning of the gastrointestinal tract can lead to nausea.

Disorders of the stomach and the upper parts of the gastrointestinal tract in general are more associated with nausea.

It often happens that after this state of nausea, the body reacts and by quickly emptying the stomach, it eliminates the nausea, that is, nausea is eliminated following vomiting.

The first parts of the small intestine and stomach can have disorders that manifest with nausea and vomiting. If the color of the vomit is bright yellow or dark green, the problems of these parts should be suspected.


What causes nausea after eating?

We said that doctors mention different causes for nausea after eating, which we will mention below.

  • Infections and inflammations:

If you have eaten food that is not well-preserved or well-cooked, it can probably contain a lot of toxins. These toxins will cause irritation and inflammation and will be accompanied by nausea after eating.

Bacterial toxins in contaminated food can manifest as nausea for several hours after eating.

Viruses can cause a condition called stomach flu. Viruses can also cause inflammation in other parts of the gastrointestinal tract, with nausea being one of the most common manifestations.

Eating contaminated and unhealthy foods as well as transmitting germs and viruses from an infected person or following the food of an infected person are ways of transmitting these gastrointestinal infectious agents.

Gastrointestinal infections manifest themselves with the following symptoms:

  • Nausea
  • Vomit
  • Abdominal pain
  • Abdominal cramps
  • Fever
  • Diarrhea


  • Hormones:

The most well-known effect of hormones on the digestive system will be in pregnancy

Pregnant women experience nausea from the second month of pregnancy. This nausea can be before or after eating.

In a group of pregnant women, morning sickness is more common, but know that pregnancy nausea can continue throughout the day.

Pregnancy nausea is not dangerous for mother and fetus and usually resolves spontaneously at four months of pregnancy.

Hormonal changes in pregnancy will also slow down bowel movements so pregnant women can experience constipation. Another effect of hormonal changes in pregnancy will be at the junction of the esophagus with the stomach. This part relaxes during pregnancy, so you may experience acid reflux. The stomach expands to the esophagus during pregnancy.

This reflux itself can be a cause of nausea after eating.


  • Food intolerances:

Food allergies are another cause of nausea after eating

Also, the digestive system of some people is not able to fully and correctly digest some foods.

Unlike food allergies, intolerance to some foods will not affect your immune system, but without affecting the immune system, they will cause nausea even hours after eating.

Examples of oral intolerances include:

Dairy products and products containing lactose

Gluten in large volumes of foods containing wheat

Legumes, cabbages, and in fact foods that produce gas in the intestines

Food allergies begin within a few seconds or minutes after eating improperly, and symptoms include the following:

Swelling of the face, mucous membranes of the mouth, lips and throat

Sore throat and lips

Remember that these symptoms are a medical emergency because the progressive swelling at any time may block the airway.

  • Gastric acid reflux into the esophagus:

It is accompanied by burning of the esophagus and throat and nausea after eating.

  • Gallbladder problems:

In case of bile problems, nausea is common after eating large, heavy and fatty foods.

  • Obstructions along the gastrointestinal tract:
  • Esophageal stenosis
  • Intragastric space-occupying tumors
  • Obstruction of the gastric outlet
  • Tumors of the liver and head of the pancreas
  • Intestinal obstruction due to tumor and…
  • Vascular causes:

Narrowing of the arteries that supply blood to the intestinal wall, which is common in people with a history of coronary artery stenosis, can reduce blood flow to the intestines and cause abdominal pain and nausea after eating.

  • Nausea following headaches:

Migraine is one of the causes that will be associated with nausea after eating

With this nausea, a person may experience lightheadedness, headache, and vomiting

  • Motion sickness:

People with motion sickness should not eat before, during and shortly after boarding vehicles. These people may experience severe nausea if this is not done.

  • Medicines:
  • Antibiotics
  • Chemotherapy drugs

They can be accompanied by nausea after eating

  • Psychological causes:

People who experience mood disorders such as: depression and anxiety may have more nausea after eating than others.

Two important disorders called anorexia nervosa and bulimia nervosa, which are subordinate to eating disorders, are also associated with nausea.

Nausea is common following anorexia nervosa and prolonged starvation of these individuals and increased acid secretion.

After eating heavy and bulky meals and overeating in bulimia nervosa, the vomiting person empties everything he eats.


Symptoms accompany

  • In gastrointestinal infections and inflammation:
  • Nausea
  • Vomit
  • Diarrhea
  • Fever
  • Abdominal pain
  • Abdominal cramps
  • Food allergies:
  • Nausea
  • Vomit
  • stomachache
  • Skin rashes
  • Swelling of the face, lips and throat
  • Shortness of breath
  • Lightheadedness

getting hot and nauseous after eating

  • Sneezing
  • Gastric or peptic reflux:
  • Heartburn
  • Bad smell of breath
  • Flatulent
  • Difficult to swallow
  • Sputum behind the throat
  • Need to clear the throat regularly
  • Chronic cough
  • Food poisoning:
  • Nausea
  • Vomit
  • Diarrhea
  • Fatigue
  • Decreased appetite
  • Fever
  • Stomach pains
  • Gallbladder disorders:
  • Nausea
  • Vomit
  • Fever
  • Typical pain in the upper and right abdomen
  • Dark urine and light stools
  • IBS:
  • Diarrhea
  • Constipation
  • Abdominal cramps
  • Vascular disorders:
  • Vomit
  • Diarrhea
  • Fever
  • Flatulent
  • Acute pancreatitis:

Acute inflammation of the pancreas is associated with severe pain in the upper and left abdomen.


Spread the pain to the back


Nausea and abdominal pain following eating


When should we see a doctor?

In the following cases, it is necessary to see a doctor

Postprandial nausea is generally not serious unless you experience one or more of the following symptoms:

  • Very severe and unbearable pain in the abdomen and stomach
  • Symptoms last for more than two or three days
  • Green vomit
  • Bloody vomit
  • Decreased appetite
  • Chest pain
  • Shortness of breath
  • Swelling of the lips and throat
  • Difficulty swallowing
  • Difficulty breathing
  • High fever


In children:

  • Any type of vomiting in infants under six months
  • High fever with vomiting in infants older than six months
  • Vomiting frequently over eight hours in infants older than six months
  • Bloody vomiting in children and infants older than six months
  • Abdominal pain for more than two hours in infants older than six months
  • Vomiting and headache in infants older than six months
  • Vomiting and drowsiness in infants older than six months
  • Vomiting in addition to not urinating in the last eight hours in infants older than six months


Diagnostic measures

In addition to a thorough history and examination, physicians may use the following measures as appropriate to help you make an accurate diagnosis.

Blood and urine tests

Radiological procedures such as X-rays, ultrasound, or CT scans and abdominal MRIs.

Invasive procedures such as colonoscopy, endoscopy and…



Depending on the cause, nausea will be treated differently after eating.

In case of intolerance to foods and food allergies, special abstinences are recommended

In gastroesophageal reflux disease, treatment is performed with a combination of lifestyle changes along with drugs such as omeprazole and pantoprazole.

Gallbladder problems are possible with intestinal rest, infection control, and surgery.

Appropriate treatment will be provided for obstructions according to the cause of the obstruction



To prevent nausea and vomiting after eating, pay attention to the following points:

  • Reduce the volume of your meal
  • Do not overeat
  • Use dry toast and crackers
  • Stop eating as soon as you feel nauseous
  • Use ginger to help reduce nausea. You can use ginger candy, ginger gum and ginger ale.
  • Avoid consuming too much dairy
  • Avoid high-fiber, gas-producing foods
  • Drink water regularly and in small amounts
  • Again, divide your meals into several portions and reduce the volume of each meal.


Written by Dr.Bayat
Associate Professor of Orthopedic expert,Brigham Hostpital



  • Association between cag-pathogenicity island in Helicobacter pylori isolates from peptic ulcer, gastric carcinoma, and non-ulcer dyspepsia subjects with histological changes.

  • Vakil, N., S.V. van Zanten, K. Kahrilas, et al. 2006. The Montreal definition and classification of gastroesophageal reflux disease: a global evidence-based consensus. Am. J. Gastroenterol.

  • Tack, J. & J.E. Pandolfino. 2018. Pathophysiology of gastroesophageal reflux disease.

  • Lugea, A. et al. Human pancreatic acinar cells: proteomic characterization, physiologic responses, and organellar disorders in ex vivo pancreatitis. Am. J. Pathol.

  • Peery, A. F. et al. Burden of gastrointestinal, liver, and pancreatic diseases in the United States.

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