Pain on the right side of your body can come from over a dozen different organs and structures, so the location, timing, and character of the pain matter more than the pain itself. The right side houses your gallbladder, appendix, liver, right kidney, and the lower lobe of your right lung, and all of them can produce pain that feels surprisingly similar. Where exactly it hurts, what makes it worse, and how it started are the best clues to narrowing down the cause.
Pain Under the Right Ribcage
The most common culprit for sharp or squeezing pain just below the right ribs is the gallbladder. When a gallstone partially blocks the flow of bile, your gallbladder contracts harder to push bile through, and pressure builds behind the blockage. This produces what doctors call biliary colic: intense, cramping pain that builds steadily to a peak, lasts anywhere from 20 minutes to a few hours, then gradually fades. It doesn’t come and go in waves during an episode. Instead, it locks in and holds until bile flow slows after digestion or the stone shifts enough to let bile pass.
Gallbladder pain often strikes shortly after a large or fatty meal because fat in your small intestine signals the gallbladder to squeeze. You may also feel it in your right shoulder, and nausea or vomiting frequently comes along with it. If you notice a pattern of episodes after rich meals, a low-fat diet can reduce how often your gallbladder contracts and lower the chance of triggering another round.
If pain under the right ribs doesn’t match that episodic, meal-triggered pattern, the liver is another possibility. The liver itself doesn’t have pain receptors, but the thin capsule surrounding it does. When the liver swells from inflammation, fatty buildup, or congestion, that capsule stretches and activates pain receptors in the surrounding tissue. This tends to produce a duller, more constant ache rather than the sharp, intense episodes of gallbladder pain.
Pain That Starts Near the Belly Button
Appendicitis has a signature pattern that’s worth memorizing. It typically begins as a vague ache around the belly button, then over several hours migrates to the lower right abdomen. The pain worsens with coughing, walking, or any jarring movement. If you press on the lower right area and feel a sharp spike of pain when you release the pressure, that’s a classic warning sign. Appendicitis is a time-sensitive emergency because a burst appendix can cause a dangerous abdominal infection.
Not everyone follows the textbook pattern. Some people, especially children and pregnant women, feel the pain in slightly different locations. But the combination of pain that moves from the center to the lower right, gets worse with movement, and steadily intensifies over hours is distinctive enough to act on quickly.
Flank Pain That Radiates Downward
A kidney stone on the right side produces pain that usually starts in the back or flank, roughly at waist level, and radiates forward and downward as the stone moves. Most people describe it as a downward-traveling flank pain that progresses into the lower abdomen, pelvis, and sometimes the groin or genitals as the stone works its way from the kidney through the ureter toward the bladder. The pain can be excruciating, often coming in intense waves, and it’s commonly accompanied by blood in the urine, nausea, and an urgent need to urinate.
What sets kidney stone pain apart from other right-side causes is the radiation pattern. Gallbladder pain stays mostly under the ribs and may hit the shoulder. Appendicitis settles into the lower right abdomen. Kidney stone pain sweeps from back to front and travels downward over time as the stone moves through the urinary tract.
Muscle Strain vs. Hernia
Not all right-side pain comes from an organ. The oblique muscles that wrap around your torso can strain during twisting motions, heavy lifting, or even prolonged coughing. A strained muscle produces localized pain that worsens when you move, twist, or engage your core, but there’s no visible lump or bulge at the site.
A hernia, by contrast, often presents with a noticeable bulge that appears when you strain or stand up and may flatten when you lie down. The pain from a hernia tends to center on that bulge and worsen with bearing down, lifting, or prolonged standing. If you can see or feel a soft lump at the site of your pain, that distinction matters because hernias don’t resolve on their own and can become emergencies if the protruding tissue gets trapped.
When the Lungs Mimic Abdominal Pain
One of the trickiest sources of right-side pain is actually above the diaphragm. The lower lobe of the right lung sits just above the liver and gallbladder, and conditions like pneumonia or pleurisy (inflammation of the lung lining) can cause pain that feels like it’s coming from under the ribs. Organs share nerve pathways internally, so your brain can’t always pinpoint the source the way it can when something touches your skin. A specialist at Northwell Health explains it this way: if someone touches the outside of your body, you immediately know where, but organs share communication channels with the brain, making internal pain much harder to localize.
Pleurisy pain typically gets sharper when you breathe deeply or cough, which can help distinguish it from gallbladder or liver problems. Pneumonia adds fever, cough, shortness of breath, and sometimes confusion in older adults. If your right-side pain gets worse every time you take a deep breath, a lung issue is worth considering even though the pain seems to be in your abdomen.
How Doctors Figure Out the Cause
When you go in for right-side pain, the imaging your doctor orders depends on your age, body type, and what they suspect. For lower right abdominal pain, ultrasound is the preferred first step for people under 30 with a lower body weight, since it avoids radiation exposure and works well when there’s less abdominal fat to scan through. For most adults over 30, a CT scan is the first-line choice because it provides clearer images through more body tissue and is more likely to give a definitive answer in one test.
Women get a specific consideration: if the pain could stem from an ovarian cyst, ectopic pregnancy, or another gynecologic cause, ultrasound is the go-to test regardless of age or body type, because it can assess both the lower right abdomen and the pelvis in a single exam. For upper right pain where the gallbladder is suspected, ultrasound is typically the starting point for everyone.
Signs That Need Immediate Attention
Some patterns of right-side pain warrant a trip to the emergency room rather than waiting for a scheduled appointment:
- Severe pain that makes it hard to sit still or find a comfortable position
- Pain that started mild and is steadily getting worse over hours
- Fever or chills alongside the pain
- Vomiting blood or shortness of breath with the pain
- Pain spreading upward toward your chest, neck, or shoulder
- Blood in your urine or stool
- Yellowing of your skin or the whites of your eyes, which signals a bile duct blockage or liver problem
- Unexplained weight loss paired with persistent pain
Severe lower right abdominal pain in particular calls for emergency evaluation because appendicitis, ovarian torsion, and ectopic pregnancy all concentrate in that area and can become dangerous within hours. Pain that won’t go away after a few hours or keeps returning in worsening episodes also crosses the threshold from “wait and see” to “get checked now.”