Your appendix is on the right side. It sits in the lower right area of your abdomen, where your small intestine connects to your large intestine. Specifically, it’s a small, finger-shaped tube that hangs off the cecum, which is the very first section of your large intestine.
Pinpointing the Exact Spot
If you draw an imaginary line between your belly button and the bony point at the front of your right hip, the appendix sits roughly at the midpoint of that line. Doctors call this “McBurney’s point,” and it’s about 1.5 to 2 inches inward from the hip bone along that diagonal. When someone has appendicitis, pressing on this spot typically produces sharp tenderness.
That said, the appendix doesn’t sit in exactly the same position in everyone. In a significant number of people, the appendix curls behind the cecum rather than dangling below it. When the appendix is tucked behind the intestine like this, pain from appendicitis can show up in unexpected places, including the flank or back. In one surgical study, only 36% of patients with this variation had the textbook pattern of appendicitis symptoms. The other 64% had subtler or atypical presentations, and some experienced delays in diagnosis.
When the Appendix Is on the Left
In rare cases, the appendix actually is on the left side. A condition called situs inversus causes all the major organs to be mirror-flipped from their normal positions. The heart shifts to the right side of the chest, the liver and gallbladder move to the left, and the appendix ends up in the lower left abdomen. This affects roughly 1 in 10,000 people. Many don’t know they have it until imaging for an unrelated issue reveals the reversal.
How Pregnancy Shifts the Position
During pregnancy, the growing uterus gradually pushes the appendix upward and outward from its usual spot. MRI studies have confirmed this displacement. As pregnancy progresses, the appendix becomes less likely to be found in the lower right area and increasingly turns up in the upper right quadrant instead. This is one reason appendicitis can be harder to recognize in pregnant women: the pain may appear higher on the abdomen than expected, especially in the second and third trimesters.
Why the Location Matters for Appendicitis
Knowing which side your appendix is on matters most when you’re trying to figure out whether abdominal pain could be appendicitis. Globally, about 17 million new cases of appendicitis occur each year, so it’s far from uncommon. The classic pattern starts with a dull ache around the belly button that gradually migrates to the lower right side over 12 to 24 hours, often accompanied by loss of appetite and nausea. But that textbook sequence only happens in about half of cases.
One useful clue: pressing on the left side of the abdomen can actually reveal appendicitis on the right. If pressure on your lower left abdomen triggers a sharp pain in the lower right, that’s a strong indicator of appendiceal inflammation. This referred pain happens because pushing on the left side shifts intestinal contents toward the inflamed appendix on the right.
How Quickly It Can Become Serious
Appendicitis progresses through stages. Research tracking the timeline found that the appendix typically becomes visibly inflamed around 36 hours after symptoms begin, develops pus around 41 hours, and begins to die off around 55 hours. The risk of rupture jumps significantly after 72 hours of symptoms. Before that 72-hour mark, the likelihood of perforation remains relatively stable, but beyond it the odds increase sharply.
A ruptured appendix can spill bacteria into the abdominal cavity, leading to a serious infection. Persistent or worsening pain on the right side of your abdomen, especially if it started near your belly button, warrants prompt medical evaluation rather than a wait-and-see approach.