Upper abdominal pain has a wide range of causes, from common digestive issues like acid reflux and gastritis to more urgent problems like gallstones or pancreatitis. Where exactly the pain sits, when it started, and what makes it better or worse are the best clues to narrowing down what’s going on.
Your upper abdomen spans three zones: the right side (under the right ribs, where your gallbladder and liver sit), the left side (near the spleen and part of the stomach), and the center, called the epigastric area (where the stomach, pancreas, and the opening of the small intestine live). Pain in each zone points toward different organs and conditions.
Acid Reflux and Chronic Indigestion
The most common explanation for recurring upper abdominal pain is some form of dyspepsia, the medical term for chronic indigestion. It causes burning or gnawing pain in the center of your upper abdomen, bloating, and feeling uncomfortably full after eating only a small amount. These symptoms overlap heavily with acid reflux (GERD), and the two conditions often coexist. The key difference: reflux tends to produce a burning sensation that rises into the chest and throat, while dyspepsia stays concentrated in the stomach area.
Functional dyspepsia is a specific diagnosis where all the standard tests come back normal but the symptoms persist. It comes in two patterns. One centers on pain and burning between meals, mimicking an ulcer. The other centers on fullness, bloating, and discomfort after eating. A hallmark of functional dyspepsia is that symptoms aren’t relieved by burping, passing gas, or having a bowel movement. If those things do bring relief, the problem is more likely further down in the intestines.
Gastritis and Stomach Ulcers
Gastritis is inflammation of the stomach lining itself. It can flare up suddenly (from heavy alcohol use, painkillers like ibuprofen, or a stomach bug) or develop slowly over months or years from a chronic bacterial infection. Many people with mild gastritis feel nothing at all. When symptoms do appear, they typically include loss of appetite, nausea, bloating, and a dull ache or burning in the upper center of the abdomen. These symptoms mean the stomach lining has worn down enough that stomach acid is starting to irritate exposed tissue.
If gastritis goes untreated, it can progress into a peptic ulcer, an actual open sore on the stomach lining or the first part of the small intestine. The signature symptom is a burning stomach pain that starts between meals or during the night, briefly improves when you eat or take an antacid, and then returns. It can last anywhere from minutes to hours and tends to come and go over days or weeks. A bacterial infection called H. pylori is one of the most common underlying causes, along with regular use of anti-inflammatory painkillers.
Gallbladder Pain
If the pain is concentrated under your right ribs and tends to hit after meals, your gallbladder is a strong suspect. Gallstones are extremely common, and many people carry them without knowing. The trouble starts when a stone temporarily blocks the duct that drains bile from the gallbladder. This triggers what’s called biliary colic: a sudden, intense, squeezing pain in the right upper abdomen that can radiate to the right shoulder blade or the center of the chest.
A typical episode lasts anywhere from 20 minutes to a few hours, then fades as the stone shifts. It’s often triggered shortly after a large or fatty meal because dietary fat signals the gallbladder to contract and release bile. If the pain lasts longer than a few hours, comes with fever, or the skin or whites of the eyes turn yellow, the situation may have progressed from a simple stone to an infection or a fully blocked bile duct, both of which need prompt medical attention.
Pancreatitis
The pancreas sits deep in the upper abdomen, behind the stomach. When it becomes inflamed, the pain is usually severe, centered in the upper middle abdomen, and radiates straight through to the mid-back. Nausea and vomiting almost always accompany it. A distinctive feature: the pain often gets worse when you lie flat on your back and improves slightly when you lean forward.
Acute pancreatitis is most commonly caused by gallstones that block the pancreatic duct or by heavy alcohol use. It’s a serious condition that typically requires hospitalization. The pain tends to come on quickly and escalate over hours rather than days.
Muscle Strain vs. Organ Pain
Not all upper abdominal pain comes from an internal organ. The abdominal wall itself, meaning the muscles, nerves, and connective tissue between your ribs and pelvis, can be the source. This is more common than most people realize and is frequently misdiagnosed as a stomach or gallbladder problem.
There’s a simple way to get a clue at home. Press on the tender spot, then tighten your abdominal muscles (as if you’re doing a crunch or sit-up). If the pain stays the same or gets worse when your abs are tensed, it’s likely coming from the abdominal wall, not from an organ underneath. Organ pain typically feels less sharp when you tense the muscles because the contracted wall shields the organs from the pressure of your fingers. Common culprits for abdominal wall pain include pulled muscles from exercise, a trapped nerve, or even a healing surgical scar.
Heart-Related Upper Abdominal Pain
This is the cause most people don’t think of, and the one with the highest stakes. A heart attack can present as upper abdominal pain, particularly in the epigastric region. It’s frequently described as burning, pressure, or something that feels like bad indigestion. This atypical presentation is more common in women than in men, and it contributes to delays in diagnosis. In one large analysis, about 30% of women experiencing an acute cardiac event reported indigestion-like symptoms.
Upper abdominal pain that comes with shortness of breath, sweating, lightheadedness, or pain that spreads into the jaw, neck, or left arm warrants immediate emergency evaluation. This is especially true if you have risk factors like high blood pressure, diabetes, smoking history, or a family history of heart disease.
How to Tell What’s Going On
A few patterns can help you sort through the possibilities before you see a doctor:
- Pain that burns between meals and improves with food: ulcer or gastritis.
- Pain after eating, especially fatty meals, under the right ribs: gallstones.
- Burning that rises into the chest or throat: acid reflux.
- Severe pain radiating to the back with vomiting: pancreatitis.
- Pain that worsens when you tense your abs: abdominal wall strain.
- Fullness and bloating after small meals, not relieved by gas: functional dyspepsia.
Signs That Need Urgent Attention
Most upper abdominal pain is caused by something manageable, but certain features signal a problem that can’t wait. Seek emergency care if the pain is accompanied by vomiting that won’t stop or you can’t keep liquids down, if your skin or eyes look yellow, if you’re vomiting blood or material that looks like coffee grounds, or if your abdomen feels rigid and board-like to the touch.
Also take it seriously if the pain resembles something you’ve experienced before but is noticeably more severe or different in character this time. Previous abdominal surgery raises the risk of adhesions or internal complications that can cause new pain patterns. Pain that started gradually and has been worsening over days, with fever or unintentional weight loss, also deserves a medical workup rather than a wait-and-see approach.