Stomach pain has dozens of possible causes, but most cases come down to a handful of common ones: indigestion, gas, constipation, a stomach virus, or something you ate. The good news is that the majority of stomach pain is temporary and resolves on its own within hours to a couple of days. Understanding where the pain is, what it feels like, and when it started can help you narrow down what’s going on.
What Your Pain Actually Feels Like Matters
Your gut has far fewer pain-sensing nerves than your skin, and they’re spread out over a large area. That’s why stomach pain often feels dull, achy, and hard to pinpoint. You might say “my whole stomach hurts” because your brain genuinely can’t map the signal to one exact spot. This type of deep, vague discomfort is the most common kind of abdominal pain, and it usually comes from the organs themselves being stretched, inflamed, or irritated.
Sharp, localized pain that you can point to with one finger is different. It typically means the lining of your abdominal wall is irritated, often because inflammation from an organ has spread to the tissue around it. This kind of pain tends to be more serious. If dull, spread-out discomfort suddenly becomes sharp and fixed in one spot, that shift is worth paying attention to.
The Most Common Causes
If your stomach started hurting after a meal, the likeliest explanations are straightforward: indigestion, gas, a food intolerance, or mild food poisoning. Eating too fast, eating too much, or eating something your body doesn’t process well can all trigger cramping, bloating, or a burning feeling in your upper abdomen. These usually pass within a few hours.
Constipation is another frequent culprit that people overlook. When stool backs up in the colon, it can cause widespread cramping and pressure that feels like a stomachache. If you haven’t had a bowel movement in a couple of days and your abdomen feels bloated and tender, that’s likely the issue.
Viral gastroenteritis, commonly called the stomach flu, brings on nausea, vomiting, diarrhea, and cramping that typically lasts about two days. Food poisoning causes similar symptoms but tends to hit faster (within hours of eating the contaminated food) and resolve more quickly. Both are miserable but usually self-limiting.
Where the Pain Is Can Tell You a Lot
Pain in the upper left abdomen often involves the stomach itself or the pancreas. A burning or gnawing sensation between meals or at night could point to gastritis, which is general inflammation of the stomach lining. Acid reflux (GERD) causes a similar burning feeling, often higher up near the breastbone, and tends to worsen after eating or when lying down.
Upper middle abdomen pain that gets worse after eating, especially if it’s severe and radiates to your back, can signal pancreatitis. This pain often builds over days and may come with nausea, fever, and a rapid pulse.
Pain in the lower right abdomen is the classic location for appendicitis, though it often starts as vague pain around the belly button before migrating to the lower right side. It usually comes with loss of appetite, nausea, and sometimes fever. Lower abdominal pain more broadly can come from the colon, bladder, or reproductive organs.
Gastritis vs. Ulcers
These two conditions overlap, but they’re not the same thing. Gastritis is widespread inflammation of the stomach lining. An ulcer is an actual eroded patch in that lining, like a sore. Both can cause a burning feeling in your stomach, but ulcers tend to produce more intense, localized pain. A hallmark of ulcers is feeling very hungry one to three hours after eating, then experiencing pain when you eat again.
Ulcers also carry risks that gastritis doesn’t, including bleeding and, in rare cases, perforation (a hole through the stomach wall). If you’re seeing blood in your stool or vomit, or your pain is getting steadily worse over days, that’s beyond typical gastritis territory.
Food Intolerances and Sensitivities
If your stomach pain follows a pattern tied to specific foods, an intolerance is a strong possibility. Lactose intolerance causes bloating, cramping, and diarrhea after consuming dairy because your body doesn’t produce enough of the enzyme needed to break down milk sugar. Symptoms usually start within 30 minutes to two hours of eating dairy.
Celiac disease is a different mechanism entirely. It’s an autoimmune condition where gluten (found in wheat, barley, and rye) triggers your immune system to attack the lining of your small intestine. The belly pain from celiac disease can be harder to connect to a specific meal because the damage is cumulative. Over time, the intestinal damage can actually cause secondary intolerances to dairy and other sugars, making it seem like you’re reacting to everything. If cutting out one food group doesn’t resolve your symptoms, celiac disease is worth investigating.
When Stomach Pain Keeps Coming Back
Recurring stomach pain that lasts months rather than days may point to a functional gut disorder like irritable bowel syndrome (IBS) or functional dyspepsia. IBS is diagnosed when you’ve had abdominal pain at least one day per week for three months, and the pain is connected to changes in how often you go, how your stool looks, or whether having a bowel movement makes the pain better or worse. Symptoms need to have been present for at least six months before diagnosis.
Functional dyspepsia is the clinical term for chronic indigestion with no identifiable structural cause. You feel uncomfortably full after meals, get full very quickly while eating, or have persistent burning or pain in the upper stomach, but scans and scopes come back normal. Both conditions are real and treatable, even though nothing looks “wrong” on imaging. They involve the way your gut and brain communicate, not damage you can see on a test.
Simple Relief for Mild Pain
For run-of-the-mill stomach pain from indigestion or gas, a few things help. Over-the-counter antacids can neutralize stomach acid quickly. Simethicone-based products help break up gas bubbles. If you need a pain reliever, acetaminophen is the gentlest option for your stomach. Anti-inflammatory painkillers like ibuprofen and aspirin are hard on the stomach lining and can actually make the pain worse, especially on an empty stomach.
Staying hydrated matters more than eating if you’re dealing with a stomach bug. Small sips of water or an electrolyte drink are easier to keep down than large gulps. Bland foods like toast, rice, and bananas are the safest first meals when you’re recovering. Most viral stomach illnesses clear up within about two days without any specific treatment.
Signs You Need Immediate Help
Most stomach pain isn’t an emergency, but certain patterns are. The American College of Emergency Physicians recommends seeking emergency care if your pain is sudden and severe, or if it doesn’t ease within 30 minutes. Continuous, severe pain paired with nonstop vomiting can indicate a serious or life-threatening condition like a bowel obstruction, appendicitis, or pancreatitis.
Other red flags include fever with worsening abdominal pain, blood in your vomit or stool, pain so bad you can’t sit still or find a comfortable position, and a rigid abdomen that’s painful to touch. Appendicitis pain, specifically, often starts as vague discomfort near the belly button and moves to the lower right side over several hours. If that pattern matches what you’re feeling, don’t wait it out.