Stomach Pain With Diarrhea After Eating? Common Triggers to Check
A reader wrote in and asked about stomach pain and diarrhea after eating. It isn’t happening every single time, but it has happened often enough over a few weeks that they’ve started to notice a pattern.
According to Healthline, diarrhea that happens after eating is known as postprandial diarrhea, and it can be linked to several causes, including lactose intolerance, food poisoning, IBS, and celiac disease. It can also be sudden.
It isn’t the kind of thing most people want to discuss, but very much worth tracking. Especially as digestive symptoms are often one of those things people try to explain away. Maybe it was the coffee. Maybe it was the takeout. Maybe it was stress. Sometimes those thoughts are accurate, but when the same problem keeps showing up after meals, even off and on, it’s smart to look closer.
Can food cause stomach pain and diarrhea?
The simple truth is that certain foods can cause stomach pain and diarrhea, especially if your body has trouble digesting them.
For example, dairy can trigger symptoms in people with lactose intolerance. Healthline states that people who can’t fully digest lactose may have diarrhea, bloating, cramping, nausea, vomiting, fullness, and gas after eating foods with lactose.
Spicy, acidic, or fatty foods may also irritate the stomach in some people. Ubie states that gastritis, or stomach inflammation, can cause belly pain and loose stools after eating, especially after those kinds of meals.
Food poisoning is another possibility, though that usually feels more intense. The CDC says common food poisoning symptoms include diarrhea, stomach pain or cramps, nausea, vomiting, and fever. Some germs can make you sick within hours, while others may take days.
Triggers that come and go
Recurring symptoms after eating can happen for a few different reasons. Food intolerance is one, but so is IBS.
IBS can include abdominal pain, bloating, cramping, diarrhea, constipation, gas, low energy, nausea, and heartburn. Certain foods and stress may also make symptoms worse.
Another consideration is dumping syndrome is less common, but it’s worth knowing about, especially for anyone who has had stomach, esophagus, or weight-loss surgery.
The Mayo Clinic states that dumping syndrome happens when food moves from the stomach into the small intestine too quickly after eating. Symptoms can include stomach cramps and diarrhea 10 to 30 minutes after eating, or symptoms 1 to 3 hours later.
Information from the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) shows a similar timeline. Early dumping syndrome can happen within 30 minutes after a meal, while late dumping syndrome can happen 1 to 3 hours after eating. Nausea, light-headedness, and tiredness may also be part of the picture.
Symptoms worth tracking
We recommend keeping a food diary. Write down what you ate, when symptoms started, how long they lasted, and whether you had bloating, gas, nausea, vomiting, fever, fatigue, dizziness, or weight loss. Also note whether the stool looked black, bloody, greasy, or unusually pale.
Also cover timings. For instance, did the pain and diarrhea start within 30 minutes of eating. If it did, symptoms may point in one direction. If they started several hours later, again it may help with a diagnosis.
This detailed information is potentially very useful for a doctor.
When to call a doctor
The CDC says to seek medical help for severe symptoms, including bloody diarrhea, diarrhea lasting more than 3 days, a fever over 102°F, repeated vomiting that prevents you from keeping liquids down, or signs of dehydration such as little urination, dry mouth or throat, or dizziness when standing.
The Mayo Clinic also advises contacting a healthcare professional if symptoms might be due to dumping syndrome, if diet changes don’t control symptoms, or if weight loss becomes significant.
If stomach pain and diarrhea after eating keep coming back, don’t just write it off as a bad meal. Track it and take those notes to a doctor. Don’t put it off.
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