Pain in the upper right abdomen, the area doctors call the right upper quadrant, ranks among the most common reasons people visit an emergency department or their primary care doctor. The gallbladder is the usual suspect, and for good reason: acute gallbladder inflammation is the single most frequently diagnosed cause. But the picture is messier than that. Research shows that over a third of patients initially thought to have acute cholecystitis actually turn out to have pain from something else entirely.1PubMed. US of Right Upper Quadrant Pain in the Emergency Department: Diagnosing beyond Gallbladder and Biliary Disease Your liver, parts of your intestine, the head of your pancreas, and even your right lung all occupy or border this region, and any of them can be the real source.
Gallstones and Gallbladder Inflammation
The gallbladder sits tucked beneath the liver and stores bile, a digestive fluid. Gallstones form when components of bile crystallize, and they are common: up to about one in ten people in Western countries have them. They are more frequent in women and in older adults. Most people with gallstones never have symptoms, but when a stone blocks the duct that drains the gallbladder, the result is a sudden, often intense pain beneath the right ribcage that can radiate to the right shoulder or back. This is what doctors mean by biliary colic.
If the blockage persists and the gallbladder wall becomes inflamed, that becomes acute cholecystitis. The classic presentation involves severe right upper quadrant pain, tenderness when a doctor presses beneath your right ribs while you breathe in (known as Murphy’s sign), fever, and elevated white blood cell counts.2PubMed. Clinical Presentation, Imaging, and Management of Acute Cholecystitis Not everyone shows every sign, though. Older adults and people with diabetes sometimes have muted symptoms, making diagnosis trickier. Definitive confirmation typically requires imaging, usually an ultrasound, CT scan, or a specialized nuclear medicine scan.3PubMed. TG13 diagnostic criteria and severity grading of acute cholecystitis (with videos)
When gallstones slip further downstream and block the common bile duct, they can trigger acute cholangitis, an infection of the bile duct system, or even acute pancreatitis. Both are serious complications with significant risks of complications and death, especially in elderly patients.4Best Practice & Research Clinical Gastroenterology. Gallstone disease. Complications of bile-duct stones: Acute cholangitis and pancreatitis The pain from pancreatitis usually centers more in the upper middle or left abdomen but can start on the right side if the head of the pancreas is involved.
When the Gallbladder Hurts but There Are No Stones
You can have real, recurring gallbladder-type pain with a completely normal ultrasound showing no stones at all. This situation, broadly called biliary dyskinesia, involves a gallbladder that simply does not empty properly. Diagnosis usually involves a specialized scan that measures gallbladder ejection fraction: if the gallbladder squeezes out less than about 35 to 40 percent of its contents after stimulation, the diagnosis is supported.5PubMed. Biliary dyskinesia A related problem, sphincter of Oddi dysfunction, involves spasm or abnormal pressure at the valve where bile enters the intestine.
A reduced gallbladder ejection fraction with normal blood work and no stones on ultrasound can also reflect chronic acalculous cholecystitis, cystic duct syndrome, or even a subtle biliary stricture.6PubMed Central. Biliary Dyskinesia with Reduced Gallbladder Ejection Fraction: A Diagnostic and Therapeutic Shift in Management Pressure changes inside the gallbladder and alterations in its shape during contraction play a role in generating pain in these functional disorders.7Journal of Clinical Gastroenterology. Understanding and Treating Abdominal Pain and Spasms in Organic Gastrointestinal Diseases The frustrating reality is that these conditions are harder to pin down than straightforward gallstones, and treatment decisions, including whether to remove the gallbladder, remain a matter of clinical judgment.
Liver-Related Causes
Your liver fills most of the upper right abdomen, so it should be no surprise that liver problems can produce pain in this area. Fatty liver disease, in which fat accumulates in liver cells, was actually the single most common diagnosis in one ultrasound-based study of patients with right upper quadrant pain, found in nearly 39 percent of cases, outpacing even gallstones.8The Therapist. Evaluation of the Causes of Abdominal Right Upper Quadrant Pain using Ultrasound While fatty liver itself is often painless, it can cause a dull ache or fullness beneath the ribs when the liver becomes enlarged enough to stretch its surrounding capsule. This stretching of the liver capsule, rather than damage to liver tissue itself, is what produces most liver-related pain: the liver has very few pain receptors inside it, but the membrane encasing it does.
Hepatitis from viral infections, alcohol, or autoimmune disease can inflame the liver rapidly enough to cause noticeable right upper quadrant discomfort, usually alongside fatigue, nausea, and sometimes jaundice. Liver abscesses, whether from bacteria, amoeba, or fungi, are less common but can cause fever, chills, and significant right-sided pain. Liver tumors, both benign and malignant, occasionally present with a dragging sensation or pressure under the ribs, though many are found incidentally on imaging done for other reasons.
A Cause Young Women Should Know About
Fitz-Hugh-Curtis syndrome is one of the more underappreciated causes of right upper quadrant pain, especially in young, sexually active women. It occurs when pelvic inflammatory disease, usually caused by chlamydia or gonorrhea, spreads upward from the pelvis to inflame the tissue around the liver. The resulting perihepatitis can cause sharp right upper quadrant pain that worsens with breathing or movement, mimicking gallbladder disease almost perfectly.9PubMed Central. Fitz-Hugh-Curtis Syndrome: A Diagnosis to Consider in a Woman with Right Upper Quadrant Abdominal Pain without Gallstones
What makes this diagnosis easy to miss is that some patients have no obvious genital symptoms at all. They show up with abdominal pain, get an ultrasound that shows a normal gallbladder, and may go through an extensive workup before anyone considers a pelvic infection. In one published case, a young woman had right upper quadrant pain for two months before urine testing for chlamydia finally pointed to the real diagnosis.10PubMed Central. A Diagnosis Not to Miss: A Case of Fitz-Hugh-Curtis Syndrome If you are a young woman with unexplained right-sided abdominal pain and no gallstones, this is worth discussing with your doctor, especially if you have any history of pelvic inflammatory disease or sexually transmitted infections.
When the Problem Is Not in the Abdomen at All
One of the more confusing aspects of right upper quadrant pain is that it can originate entirely outside the abdomen. The nerves that serve the diaphragm, the dome-shaped muscle separating the chest from the abdomen, share pathways with nerves supplying the upper abdomen. Conditions affecting the right lower lung or the lining around it can produce pain that the brain interprets as coming from below the ribs. Pneumonia in the right lower lobe and pleurisy, inflammation of the lung lining, are known to cause abdominal pain that can be mistaken for a gallbladder or liver problem.11JAMA. Abdominal Pain in Pleurisy and Pneumonia A chest X-ray usually clears up the confusion, but only if someone thinks to order one.
Shingles, the reactivation of the chickenpox virus in nerve roots, offers another example of pain arriving in the abdomen from a non-abdominal source. When shingles affects a nerve root that supplies the trunk at the level of the upper abdomen, the initial pain can perfectly mimic an acute abdominal emergency. The telltale blistering rash may not appear until days after the pain begins, leaving doctors and patients puzzled in the interim.12PubMed Central. Shingles (Herpes Zoster) Mimicking Acute Abdomen If you have a burning or band-like pain along one side of your trunk that seems out of proportion to any abdominal findings, shingles is worth considering, especially if you are over 50 or have a weakened immune system.
Medications, Toxins, and Blood Vessel Problems
Your liver processes almost everything you ingest, which makes it vulnerable to drug-induced injury. Drug-induced liver injury is actually the most common cause of an acute rise in liver enzymes showing a hepatocellular pattern, the type of liver cell damage that produces right upper quadrant pain, nausea, and sometimes jaundice.13Mayo Clinic Proceedings. A 20-Year-Old Woman With Abdominal Pain and Elevated Liver Enzymes Common culprits include acetaminophen (especially in overdose or heavy drinking combined with even normal doses), certain antibiotics, anti-seizure drugs, herbal supplements, and anabolic steroids. If your right upper quadrant pain started within a few weeks of beginning a new medication or supplement, mention that timeline to your doctor.
On the vascular side, Budd-Chiari syndrome is a rare but serious cause of right upper quadrant pain. It results from blockage of the veins that drain the liver, requiring at least two of the major hepatic veins to be involved before symptoms become clinically apparent. The backup of blood causes liver congestion and eventually damages liver cells, producing pain, liver enlargement, and often fluid buildup in the abdomen.14PubMed Central. Budd-Chiari syndrome: etiology, pathogenesis and diagnosis Budd-Chiari tends to occur in people with blood-clotting disorders or conditions that make blood clots more likely. It is uncommon, but doctors think of it when liver imaging shows signs of congestion that do not fit other patterns.
Right Upper Quadrant Pain During Pregnancy
Pregnancy adds its own set of possibilities. Gallstone-related problems become more common during pregnancy because hormonal changes slow gallbladder emptying and alter bile composition. But the more dangerous pregnancy-specific cause of right upper quadrant pain is HELLP syndrome, a severe complication related to preeclampsia. HELLP stands for hemolysis, elevated liver enzymes, and low platelet count, and it can develop rapidly in the second half of pregnancy.
In one study of pregnant women with abdominal pain and preeclampsia, ultrasound revealed liver abnormalities in 28 patients, including liver enlargement, thickening around the liver’s blood vessels, and gallbladder wall changes. Notably, pressing on the liver reproduced the pain, while pressing on the gallbladder did not, helping distinguish HELLP from gallbladder disease. All of these patients eventually met diagnostic criteria for HELLP syndrome.15Wiley Online Library. Abdominal pain and preeclampsia: sonographic findings in the maternal liver Any pregnant woman experiencing right upper quadrant pain, especially after 20 weeks, should be evaluated promptly. HELLP can escalate quickly and poses serious risks to both mother and baby.
How Doctors Sort Through the Possibilities
Given how many things can cause pain in this area, the diagnostic workup typically starts with blood tests and imaging. Blood work helps narrow the field: liver enzyme patterns point toward liver cell damage or bile duct obstruction, a high white blood cell count suggests infection or inflammation, and pancreatic enzyme levels can flag pancreatitis. In pregnancy, platelet counts and hemolysis markers become especially important.
For imaging, ultrasound is usually the first step. It is inexpensive, involves no radiation, and is excellent at detecting gallstones, gallbladder inflammation, liver abnormalities, and bile duct dilation. When ultrasound comes back normal or inconclusive, CT scanning becomes valuable. In a large retrospective review of more than 2,800 emergency department cases, ultrasound and CT performed similarly for confirming or ruling out cholecystitis specifically. But CT proved far better at catching non-gallbladder problems that ultrasound missed: among patients who had both scans, CT identified an acute non-gallbladder abnormality that ultrasound had missed in about 32 percent of cases, while ultrasound almost never caught something CT did not.16PubMed. Role of Ultrasound and CT in the Workup of Right Upper Quadrant Pain in Adults in the Emergency Department: A Retrospective Review of More Than 2800 Cases
This does not mean everyone with right upper quadrant pain needs a CT scan. Ultrasound remains the preferred first test when biliary disease is the leading clinical suspicion because it is fast, safe, and highly specific for gallstones. CT is most useful when the clinical picture is muddled or when the initial ultrasound does not explain the symptoms.17International Journal of Current Science Research and Review. Comparison of Diagnostic Accuracy of CT scan and USG in Right Upper Quadrant Pain: A Review Analysis Specialized tests like a HIDA scan, which tracks how bile moves through the system, are reserved for situations where the gallbladder is suspected but standard imaging is inconclusive, or when biliary dyskinesia is a concern.
When to Seek Urgent Care
Not all right upper quadrant pain demands a trip to the emergency room, but certain features should prompt you to get evaluated quickly. Severe pain that does not let up, especially if accompanied by fever, warrants same-day medical attention. Yellowing of the skin or eyes (jaundice) suggests a bile duct obstruction or significant liver problem. Vomiting that will not stop, pain after a traumatic injury to the right side of the body, or signs of shock like lightheadedness and rapid heartbeat are all reasons to go to the emergency department.
For pregnant women, right upper quadrant pain with headaches, visual changes, or swelling can signal preeclampsia or HELLP syndrome and should be treated as an emergency. In older adults or people with weakened immune systems, even modest-sounding symptoms deserve closer attention because the body’s normal alarm signals are often blunted.
On the other hand, a mild, intermittent ache that comes and goes over weeks or months, does not wake you from sleep, and is not associated with fever or weight loss is less likely to be an emergency. That said, persistent pain always deserves investigation. A visit to your primary care doctor, some blood work, and an ultrasound can usually start to narrow down the cause and determine whether you need further testing or specialist referral.
Why Age and Sex Shift the Odds
The likely cause of right upper quadrant pain changes meaningfully depending on who you are. In women over 45, gallstone-related disease and fatty liver disease are among the most frequent diagnoses. One ultrasound study found that women in this age group accounted for the largest share of cases by a wide margin.8The Therapist. Evaluation of the Causes of Abdominal Right Upper Quadrant Pain using Ultrasound Pregnancy, hormonal contraceptive use, and rapid weight changes all independently raise the risk of gallstone formation. In younger women, Fitz-Hugh-Curtis syndrome enters the picture as noted earlier. In men, alcohol-related liver disease and hepatitis tend to be more prominent considerations, though gallstones certainly occur too.
In children and adolescents, right upper quadrant pain is more often caused by hepatitis, constipation, or musculoskeletal strain than by gallstones, though pediatric gallstone disease is increasing alongside rising obesity rates. In older adults, the differential broadens to include things like biliary tract cancers, vascular problems, and atypical presentations of common diseases. An elderly patient with cholecystitis, for example, may have minimal pain and no fever at all, with confusion or a vague decline being the only clues.
Understanding that your age, sex, and overall health history change which diagnoses are most likely can help you have a more productive conversation with your doctor. It also explains why two people with seemingly identical symptoms may end up with very different diagnoses and treatment plans. Right upper quadrant pain is one of those symptoms where context matters at least as much as the pain itself, and a careful clinical evaluation, including the right imaging at the right time, is what turns a long list of possibilities into an actionable answer.18PubMed. ACR Appropriateness Criteria Right Upper Quadrant Pain: 2022 Update