The right side of your abdomen contains several major organs, including the liver, gallbladder, appendix, right kidney, and portions of the large and small intestine. Most people searching this question are trying to figure out what might be causing pain or discomfort on their right side, so understanding what sits where can help you make sense of what you’re feeling.
Organs in the Upper Right Abdomen
The upper right portion of your abdomen, roughly the area beneath your right ribcage, is dominated by the liver. Your liver’s right lobe is the largest organ in this region and extends across much of the upper abdomen. Tucked underneath the liver is the gallbladder, a small pouch that stores bile used for digesting fats. The gallbladder is one of the most common sources of upper right abdominal pain.
Several other structures share this space. The right kidney and its adrenal gland sit toward the back. The head of the pancreas and the duodenum (the first section of the small intestine, which connects directly to the stomach) are also located here. The right side of the large intestine curves upward in this area at a bend called the right colic flexure, where the ascending colon turns into the transverse colon.
Organs in the Lower Right Abdomen
The lower right abdomen is where your appendix lives. This small, finger-shaped pouch hangs off the cecum, which is the very beginning of the large intestine. The ascending colon runs upward from here toward the upper right quadrant. In women, the right ovary and fallopian tube also sit in this region, which is why right-sided pelvic pain in women can have causes that don’t apply to men.
Gallbladder Pain
Pain from the gallbladder typically strikes under the right ribcage and can radiate to your right shoulder or back. This happens most often when a gallstone temporarily blocks the duct that drains bile. The pain tends to come on after eating, especially fatty meals, and can last anywhere from 30 minutes to several hours. It often feels like intense pressure rather than a sharp stab. Ultrasound is the standard first imaging test for upper right abdominal pain, since it’s effective at spotting gallstones and inflammation.
Appendicitis Pain
Appendicitis is the most urgent concern when pain develops in the lower right abdomen. The classic pattern starts as a vague ache near the belly button, then migrates over several hours to the lower right side, roughly halfway between the belly button and the bony point of your right hip. The pain typically gets sharper over time and worsens with coughing, sneezing, or movement.
Other symptoms often come along with it: nausea, vomiting, loss of appetite, and a low-grade fever usually below 100.4°F. One telling sign is rebound tenderness, where the pain flares when pressure on the area is released rather than when it’s applied. Another clue is “guarding,” where your abdominal muscles tighten involuntarily when someone tries to press on the sore spot. If the appendix ruptures, the pain can spread across the entire abdomen and become much more severe, with higher fever and chills.
Gas and Constipation
The ascending colon runs along the right side of your abdomen, which means trapped gas or backed-up stool can produce pain that mimics something more serious. Gas pain can show up anywhere in the abdomen, including the right side, but a few features set it apart from conditions like appendicitis. Gas pain tends to move around rather than staying fixed in one spot, usually lasts minutes to a few hours, and resolves on its own or after passing gas or having a bowel movement. Appendicitis pain, by contrast, locks into the lower right and steadily worsens.
Right-Sided Pain in Women
Women have additional structures on the right side that can cause pain. An ovarian cyst on the right ovary can produce a dull ache or sudden sharp pain if it ruptures or twists. Mittelschmerz, the mild cramping some women feel during ovulation, occurs on whichever side released an egg that month, so it can show up on the right every other cycle or so.
More serious causes include ectopic pregnancy, where a fertilized egg implants in the right fallopian tube instead of the uterus. This can cause intense, one-sided lower abdominal pain along with vaginal bleeding and dizziness. Pelvic inflammatory disease, endometriosis, and uterine fibroids can also produce right-sided pelvic pain depending on where the inflammation or growth is located.
Kidney-Related Pain
The right kidney sits toward the back of the abdomen, just below the ribcage. Kidney stones passing through the right ureter can cause severe, wave-like pain that starts in the flank and radiates downward toward the groin. Kidney infections tend to produce a deep ache in the back or side along with fever, chills, and painful urination. Because the kidney sits behind the other organs, kidney pain often feels deeper and more toward the back compared to gallbladder or intestinal pain, which tends to be felt more toward the front.
When Right-Side Pain Needs Urgent Attention
Severe right-sided abdominal pain that comes on suddenly warrants immediate medical evaluation, especially in the lower right quadrant where appendicitis is a concern. Other warning signs include pain that started mild and keeps getting worse, vomiting blood, blood in your urine or stool, yellowing of the skin or eyes, fever with chills, pain that spreads up toward your chest or shoulder, and shortness of breath accompanying the pain. Unexplained weight loss alongside persistent abdominal pain also signals something that needs investigation.
For upper right pain, an ultrasound is typically the first step. If results are unclear and there’s no fever or elevated white blood cell count, an MRI or CT scan is usually the next option. For lower right pain with features suggesting appendicitis, imaging and blood work happen quickly because a ruptured appendix can become life-threatening within hours.