Stomach pain is one of the most common health complaints, and the cause is usually something temporary and treatable: gas, indigestion, constipation, or a mild infection. But “stomach pain” can mean very different things depending on where it hurts, how it feels, and how long it lasts. Understanding those details helps you narrow down what’s going on and whether you need to do anything about it.
Where It Hurts Matters
Your abdomen contains dozens of organs packed into a relatively small space, and each one produces pain in a slightly different spot. Thinking of your belly as four quadrants, divided by your belly button, gives you a rough map.
- Upper right: This is where your liver, gallbladder, and the upper part of your pancreas sit. Pain here often points to gallstones, especially if it flares after fatty meals.
- Upper left: Home to your stomach, spleen, and the main body of the pancreas. Burning or gnawing pain in this area is commonly acid reflux, an ulcer, or gastritis.
- Lower right: The appendix lives here, along with part of the colon and, in women, the right ovary. Sharp pain that starts near the belly button and migrates to the lower right is the classic appendicitis pattern.
- Lower left: Contains the sigmoid colon (the last curve before the rectum) and the left ovary in women. Pain here is frequently related to constipation, diverticulitis, or, in women, ovarian issues.
Pain that sits right in the center of your abdomen, especially around or above the belly button, tends to come from the stomach itself, the small intestine, or the pancreas. Pain below the belly button and centered is more likely intestinal, bladder-related, or reproductive.
How the Pain Feels Tells You a Lot
Not all stomach pain works the same way. The sensation itself gives clues about what’s happening inside.
A dull, achy, hard-to-pinpoint pain that sits somewhere in the middle of your abdomen usually comes from the organs themselves stretching or contracting. This type of pain often comes with nausea, sweating, or an urge to shift positions constantly. It’s the kind you get with gas cramps, stomach bugs, or early appendicitis before the pain sharpens.
Sharp, localized pain that you can point to with one finger, and that gets worse when you cough, take a deep breath, or press on the spot, signals that the lining of your abdominal cavity is irritated. People with this type of pain instinctively lie still, sometimes curled on their side. This pattern is more concerning and often means something has progressed beyond a simple cramp.
Sometimes abdominal problems create pain in unexpected places. A problem under the diaphragm can cause shoulder pain. An inflamed appendix sitting behind the intestine can cause pain in the groin or thigh instead of the usual lower-right spot.
The Most Common Culprits
The vast majority of stomach pain episodes come from causes that resolve on their own or with simple treatment.
Indigestion and gas are by far the most frequent. Eating too fast, eating too much, or eating foods your gut struggles to break down can leave you bloated and crampy. Certain carbohydrates are especially problematic for sensitive digestive systems. These are short-chain sugars (sometimes called FODMAPs) found in foods like onions, garlic, beans, wheat, dairy, apples, and artificial sweeteners. Your small intestine absorbs them poorly, so bacteria in your colon ferment them instead, producing gas and drawing in water.
Constipation causes more abdominal pain than most people realize, especially in the lower left side. When stool backs up, it stretches the colon wall, creating cramps that can feel surprisingly intense.
Stomach flu (viral gastroenteritis) typically brings on wavy cramps along with nausea, vomiting, or diarrhea. It hits fast, feels miserable, and usually clears within one to three days.
Food poisoning looks similar to a stomach flu but tends to come on within hours of eating contaminated food. Cramps, diarrhea, and sometimes vomiting are the hallmarks.
Acid reflux and ulcers produce a burning or gnawing pain in the upper abdomen, often worse on an empty stomach or after spicy and acidic foods. Chronic acid reflux (GERD) can also cause chest pain that people sometimes mistake for heart problems.
Urinary tract infections can cause lower abdominal pressure and pain, especially in women, even though the infection is in the bladder rather than the gut.
Causes Specific to Women
Women have additional organs in the lower abdomen that frequently cause pain. Menstrual cramps are the most obvious, but ovulation itself can cause a sharp, one-sided twinge mid-cycle that lasts a few hours to a day or two.
Ovarian cysts, which are fluid-filled sacs that form on the ovaries, are extremely common and usually painless. But when a cyst grows large or ruptures, it can cause sudden, intense pain on one side of the lower abdomen. Endometriosis, a condition where tissue similar to the uterine lining grows outside the uterus, causes chronic pelvic pain that often worsens around periods and can take years to diagnose.
An ectopic pregnancy, where a fertilized egg implants outside the uterus (usually in a fallopian tube), causes lower abdominal pain that can become a medical emergency if the tube ruptures. Any woman of reproductive age with sudden, severe lower abdominal pain and a missed or unusual period should consider this possibility seriously.
When Stomach Pain Keeps Coming Back
If your stomach hurts regularly, at least one day a week for three months or more, and the pain is connected to bowel movements or changes in how often you go or what your stool looks like, you may have irritable bowel syndrome (IBS). These are the formal diagnostic criteria, and symptoms need to have started at least six months before a diagnosis is made. IBS is not dangerous, but it’s genuinely disruptive. Peppermint oil capsules have documented effectiveness for IBS-related cramping and bloating, and a low-FODMAP diet (temporarily removing those hard-to-absorb sugars, then reintroducing them one group at a time) helps many people identify their specific triggers.
Other chronic causes include inflammatory bowel disease (Crohn’s disease or ulcerative colitis), which involves actual inflammation and damage to the intestinal wall, food intolerances like lactose or gluten sensitivity, and ongoing acid-related conditions like peptic ulcers.
Simple Remedies That Actually Help
What works depends entirely on what’s causing the pain. Antacids neutralize stomach acid and help with heartburn or acid reflux. For cramping and spasms, especially from IBS or gas, peppermint oil capsules act as a natural muscle relaxant for the intestinal wall and are approved for that purpose in adults and adolescents. A heating pad on the abdomen can ease muscle cramping regardless of the cause.
For pain tied to eating, try smaller meals, eat slowly, and pay attention to which foods consistently trigger discomfort. Keeping a simple food diary for two weeks often reveals patterns you wouldn’t notice otherwise. Staying hydrated matters too, particularly if diarrhea or vomiting is involved.
What Doctors Look For
If your pain is severe enough or persistent enough to see a doctor, the evaluation usually starts with a physical exam and questions about timing, location, and associated symptoms. Imaging depends on the situation. For right upper quadrant pain suggesting gallbladder problems, ultrasound is the first-line test. For pelvic pain in women, ultrasound is also preferred because it avoids radiation and visualizes reproductive organs well. For pain that doesn’t fit a clear pattern, a CT scan of the abdomen is the go-to choice because it can detect a wide range of problems in a single study. Pregnant patients and children are typically evaluated with ultrasound or MRI to avoid radiation exposure.
Signs You Need Help Right Away
Most stomach pain is not an emergency, but certain patterns demand immediate attention. Sudden, severe pain that hits all at once (not a gradual buildup) raises concern for serious problems like a perforated ulcer, a twisted bowel, or a ruptured blood vessel. Pain that wakes you from sleep is considered significant until proven otherwise. An abdomen that feels rigid and board-like, where the muscles involuntarily lock up to protect the organs underneath, is a classic sign of a serious abdominal emergency.
Other warning signs include pain combined with a fever over 101°F, vomiting blood or passing black tarry stools, inability to keep fluids down for more than 24 hours, and pain accompanied by fainting, dizziness, or a rapid heartbeat. In older adults, a sudden urge to have a bowel movement combined with severe abdominal pain has been described as a warning sign of a ruptured abdominal aortic aneurysm. In young women, the same combination can signal a ruptured ectopic pregnancy.