Right-sided abdominal pain has many possible causes, ranging from trapped gas to conditions that need emergency treatment. The right side of your abdomen contains your liver, gallbladder, appendix, right kidney, and portions of your small and large intestine, so pain in this area could involve any of these organs. Where exactly the pain sits, whether it’s upper or lower, and how it behaves over time are the biggest clues to what’s going on.
Trapped Gas and Digestive Irritation
The most common and least worrying cause of right-sided abdominal pain is simply gas moving through your intestines. The large intestine makes a sharp bend on the right side of your abdomen (near the liver), and gas can get temporarily trapped there, producing a sharp or crampy pain that shifts or resolves on its own within minutes to hours. You might also feel bloating, pressure, or the urge to pass gas.
Gas pain tends to come and go, move around, and feel better after a bowel movement or passing gas. If gas symptoms happen frequently or come with diarrhea, constipation, or weight loss, that pattern can point to an underlying condition like irritable bowel syndrome, lactose intolerance, or celiac disease. Occasional gas pain that resolves quickly is rarely a concern.
Appendicitis: The Lower Right Warning
Appendicitis is the condition most people worry about when the lower right side hurts, and for good reason. It’s a medical emergency. The classic pattern starts with vague pain around the belly button that hovers or comes and goes for several hours. Nausea and vomiting typically develop next. Then, over the course of hours, the pain shifts to the lower right abdomen, becomes more focused, and steadily worsens.
Other signs include fever, loss of appetite, swelling in the abdomen, and an inability to pass gas. The area becomes tender to the touch. If you press on the lower right side and it hurts more when you release pressure than when you press in, that’s a particularly telling sign. Appendicitis pain does not improve on its own. If you notice pain in your lower right abdomen that keeps intensifying, especially with nausea or fever, get to an emergency room.
Gallbladder Problems
Pain in the upper right abdomen, particularly after eating, often points to the gallbladder. Gallstones can block the flow of bile and cause episodes of intense pain called biliary colic, which typically lasts 30 minutes to several hours and then fades. When the gallbladder itself becomes inflamed (cholecystitis), the pain is more severe and persistent.
Cholecystitis produces sharp pain in the upper right or center of the abdomen that often radiates to the right shoulder or back. Nausea, vomiting, and fever frequently accompany it. Symptoms most commonly appear after a large or fatty meal. If you notice a pattern of upper right pain triggered by rich foods, gallbladder disease is high on the list of possibilities.
Kidney Stones
Your right kidney sits toward the back of your abdomen, and a stone forming or moving through the urinary tract on that side can cause intense pain. The location of the pain depends on where the stone is lodged. A stone in the kidney or upper part of the ureter typically causes flank pain, felt more in the side and back. As the stone moves lower, pain can radiate down toward the groin, testicle, or labia.
Kidney stone pain is often described as one of the most intense pains people experience. It tends to come in waves, and you may also notice blood in your urine, nausea, or a frequent urge to urinate. Unlike gas or muscle strain, the pain doesn’t improve with changes in position, and it can escalate quickly.
Liver-Related Pain
The liver fills much of the upper right abdomen, and when it swells, the surrounding capsule stretches, producing a dull, aching pain that can be hard to pinpoint. This type of pain is typically mild to moderate and may feel more like a sense of fullness or heaviness than a sharp stab. Conditions that cause liver swelling include hepatitis (viral or alcohol-related), fatty liver disease, and congestion from heart problems.
Because liver pain is often vague and slow to develop, many people attribute it to indigestion or muscle soreness. If you have persistent dull pain in the upper right area along with fatigue, yellowing of the skin or eyes, dark urine, or unexplained weight changes, liver involvement is worth investigating.
Crohn’s Disease and Chronic Causes
Not all right-sided abdominal pain is sudden. Crohn’s disease, a type of inflammatory bowel disease, most commonly affects the end of the small intestine (the terminal ileum), which sits in the lower right abdomen. The most common form, ileocolitis, involves both the terminal ileum and the colon. This can produce chronic or recurring crampy pain in the lower right side, along with ongoing diarrhea, fatigue, loss of appetite, unexpected weight loss, fever, and sometimes blood in the stool.
If you’ve had lower right abdominal pain that keeps coming back over weeks or months, particularly with changes in bowel habits or unintentional weight loss, Crohn’s disease is one of several chronic conditions your doctor may consider.
Reproductive Causes in Women
For women, the right ovary and fallopian tube sit in the lower right pelvis, adding several possibilities. An ovarian cyst on the right side can cause a dull ache or sudden sharp pain if it ruptures or twists. Mittelschmerz, the mild pain some women feel during ovulation, occurs on whichever side releases an egg that cycle and typically lasts a few hours to a day or two.
Ectopic pregnancy, where a fertilized egg implants in the right fallopian tube instead of the uterus, causes lower right pelvic pain that can become severe. This is a medical emergency. If you have a positive pregnancy test or a missed period along with sharp, worsening pain on one side, seek emergency care immediately. Pelvic inflammatory disease can also cause one-sided lower abdominal pain, often accompanied by unusual discharge, fever, or pain during intercourse.
How to Tell What’s Serious
Mild, brief pain that resolves on its own is usually not dangerous. But certain patterns signal that something needs urgent attention. Head to an emergency room if your abdominal pain is severe and getting worse, if it’s accompanied by vomiting you can’t control or an inability to keep liquids down, if you have a fever, or if your abdomen feels rigid or extremely tender to touch.
Constipation with inability to pass a bowel movement combined with severe pain, especially if you’ve had previous abdominal surgery, raises concern for a bowel obstruction. Pain that resembles a previous episode but feels more severe or different in character also warrants evaluation. And any sudden, sharp pain in the lower right abdomen in a woman of childbearing age should be assessed quickly to rule out ectopic pregnancy or ovarian torsion.
For pain that’s mild but keeps recurring over days or weeks, a visit to your primary care doctor is a reasonable next step. Persistent patterns, even when the pain itself isn’t severe, can point to conditions like gallstones, Crohn’s disease, or ovarian cysts that benefit from early diagnosis.