Most stomach pain comes from something that isn’t serious: gas, indigestion, or a pulled muscle. But because your abdomen is packed with organs, the location, timing, and type of pain all matter when figuring out the cause. Here’s what could be going on and how to make sense of what your body is telling you.
What Your Pain Feels Like Matters
Stomach pain generally falls into two categories, and they feel distinctly different. The first is a deep, dull, hard-to-pinpoint ache, often felt right in the middle of your belly. This type comes from your organs themselves, usually when something stretches, twists, or loses blood supply. It’s frequently accompanied by sweating, nausea, or vomiting because the nerves involved also control those automatic body responses. You might press on your stomach and say “it hurts somewhere around here” without being able to put a finger on the exact spot.
The second type is sharp, localized pain you can point to precisely. This happens when the lining of your abdominal wall becomes irritated, typically from inflammation or infection that has spread beyond an organ. If you notice your pain started vague and central but then moved to a specific spot and got sharper, that progression is meaningful and worth paying attention to.
Pain can also show up in surprising places. A problem with your gallbladder might cause shoulder pain. A kidney stone can radiate into your groin. This happens because nerves from different body parts feed into the same pathways in your spinal cord, and your brain can’t always tell the difference.
Where It Hurts Points to the Cause
Doctors divide the abdomen into four quadrants, and the location of your pain narrows the list of possibilities considerably.
Upper right side: This is gallbladder territory. Pain here, especially after a fatty meal, often signals gallstones or gallbladder inflammation. Liver problems and even lung infections like pneumonia can also cause pain in this area.
Upper left side: Stomach issues like gastritis (inflammation of the stomach lining) and ulcers live here, along with the pancreas. Upper left pain can also, in rarer cases, come from the heart, particularly if it’s accompanied by chest tightness or shortness of breath.
Lower right side: The classic concern here is appendicitis, which often starts as vague pain around your belly button before migrating to the lower right and becoming sharp. In women, ovarian cysts, ectopic pregnancy, and pelvic infections can also cause lower right pain.
Lower left side: Diverticulitis (inflamed pouches in the colon wall) is common here, especially in people over 40. Irritable bowel syndrome, inflammatory bowel disease, and the same gynecologic conditions that affect the right side can also be responsible.
Pain that’s dead center and hard to locate is more likely gas, indigestion, or a stomach bug.
The Most Common Culprits
For most people searching “why does my stomach hurt,” the answer is one of a handful of everyday causes.
Gas and bloating happen when bacteria in your colon ferment carbohydrates your small intestine couldn’t fully absorb. Your gut draws in extra water to push these undigested sugars along, then bacteria eat them and produce gas as a byproduct. The result: bloating, cramping, and distension. Common triggers include beans, onions, garlic, wheat products, dairy (if you’re lactose intolerant), certain fruits high in fructose, and artificial sweeteners. If you notice a pattern with specific foods, you may have trouble digesting a group of carbohydrates sometimes called FODMAPs.
Indigestion is that burning or uncomfortable fullness in your upper abdomen, often after eating too much, eating too fast, or eating rich or spicy food. Stress and smoking make it worse.
A pulled abdominal muscle is surprisingly common and easy to mistake for an internal problem. If the pain worsens when you cough, sit up, or twist, and you recently exercised hard or lifted something heavy, a muscle strain is likely.
Stomach Bugs vs. Food Poisoning
Both cause cramping, nausea, vomiting, and diarrhea, but the timeline tells them apart. Food poisoning hits fast, typically two to six hours after eating contaminated food, because bacteria or their toxins are already present in what you ate. It tends to be intense but brief. A stomach virus (viral gastroenteritis) has a longer incubation period of 24 to 48 hours, lasts about two days or sometimes longer, and spreads from person to person in close quarters rather than from a specific meal.
If multiple people who ate the same food get sick around the same time, food poisoning is the likely explanation. If family members fall ill one after another over several days, a virus is more probable.
Pain Medications That Cause Stomach Pain
Common over-the-counter painkillers like ibuprofen and aspirin can actually cause the very stomach pain you might take them to treat. These drugs work by blocking a chemical process that also happens to protect your stomach lining. Without that protection, your stomach produces less of the mucus barrier that shields it from its own acid, and blood flow to the lining decreases. The result can range from mild irritation to full-blown ulcers.
This damage is dose-dependent. Aspirin can cause visible injury to the stomach lining within an hour or two at higher doses. Ibuprofen at low doses carries less risk, but taking any of these medications regularly, especially on an empty stomach, increases your chances of stomach pain, nausea, and more serious complications over time.
When Stomach Pain Keeps Coming Back
If your stomach hurts on a recurring basis, a few chronic conditions are worth considering. Irritable bowel syndrome (IBS) is one of the most common. It’s defined by recurrent abdominal pain at least one day per week for three months, linked to changes in how often you go to the bathroom or what your stool looks like. Importantly, symptoms need to have started at least six months before a diagnosis is made, which is how doctors distinguish IBS from a temporary bout of digestive trouble.
Inflammatory bowel disease (Crohn’s disease and ulcerative colitis) causes more severe and persistent symptoms, often including bloody stool, weight loss, and fatigue alongside pain. Chronic gastritis, recurring ulcers, and food intolerances are other possibilities when pain doesn’t go away.
Keeping a simple log of when pain occurs, what you ate beforehand, and what your bowel movements look like can be enormously helpful for identifying patterns and giving your doctor something concrete to work with.
Pain That Needs Immediate Attention
Most stomach pain resolves on its own, but certain features signal something potentially dangerous. Seek emergency care if your pain is sudden and severe, or if it doesn’t ease within 30 minutes. Sudden onset abdominal pain can indicate a perforated ulcer or a ruptured blood vessel.
Other warning signs:
- Severe pain in the lower right abdomen with loss of appetite, nausea, vomiting, or fever, which may point to appendicitis
- Continuous, severe pain with nonstop vomiting, which can indicate a bowel obstruction or other life-threatening condition
- Severe abdominal pain with vaginal bleeding in women of childbearing age, a hallmark of ectopic pregnancy
- Upper middle abdominal pain that lasts days, worsens after eating, and comes with fever and a rapid pulse, which suggests pancreatitis
- A rigid, board-like abdomen that hurts more when you release pressure than when you press in
Abdominal pain accompanied by high fever, bloody stool, an inability to keep fluids down for more than a day, or pain so intense you can’t stand up straight also warrants prompt medical evaluation.