Appendix pain occurs on the lower right side of your abdomen. The appendix is a small, finger-shaped pouch attached to the colon in the lower right part of the belly, and when it becomes inflamed, that’s where you’ll feel the sharpest pain. But here’s what catches many people off guard: the pain usually doesn’t start there.
Where the Pain Starts vs. Where It Ends Up
Appendicitis typically begins as a vague, dull ache around your belly button. It can hover there or come and go for several hours, which is why many people initially dismiss it as a stomachache or something they ate. Over the next 12 to 24 hours, the pain migrates. It shifts down and to the right, settling into the lower right quadrant of your abdomen.
This migration pattern happens because of how your nerves are wired. Early on, the inflammation triggers broad nerve fibers that serve the general gut area, producing that hard-to-pinpoint discomfort near the navel. As the inflammation worsens and begins irritating the lining of the abdominal wall directly over the appendix, the pain sharpens and focuses on one spot. The most tender point typically lands about one-third of the way between your right hip bone and your belly button.
Not everyone follows this textbook pattern, but the migration from center to lower right is one of the most reliable clues that distinguishes appendicitis from other causes of abdominal pain.
When the Pain Shows Up Somewhere Unexpected
The appendix doesn’t sit in exactly the same position in every person. In roughly a quarter of people, it curls behind the colon (called a retrocecal position), which can make the pain harder to identify. Instead of the classic lower right tenderness, you might feel mild right-sided pain, right flank discomfort, or even pain that seems to come from higher up in the abdomen. In some cases, the usual spot near the hip bone won’t even feel particularly tender to the touch because the gas-filled colon sits between the inflamed appendix and the abdominal wall, shielding it from pressure. This has been called “silent appendicitis” because the typical exam findings don’t show up as expected.
Pregnancy shifts things further. As the uterus grows, it pushes the appendix upward. While most pregnant people still feel pain in the lower right area, some experience it in the right flank or even the right upper abdomen, particularly in later trimesters. This upward displacement is one reason appendicitis during pregnancy can be tricky to diagnose.
What the Pain Feels Like
The early belly button pain tends to feel crampy and diffuse. You might describe it as a general uneasiness rather than a sharp, localized ache. As it moves to the lower right, the quality changes. It becomes steady, intensifying over hours rather than minutes. Walking, coughing, or going over a speed bump in the car can make it noticeably worse because any jarring movement tugs on the inflamed tissue.
One hallmark of appendicitis is rebound tenderness. If you press down gently on the sore area and then quickly release, the moment you let go hurts significantly more than the pressing itself. That sharp spike of pain when pressure is released signals that the membrane lining your abdominal cavity is inflamed, not just the appendix alone. Another telling sign: pressing on the left side of your lower abdomen can trigger pain on the right side, because the pressure pushes gas through the colon toward the inflamed appendix, stretching it.
You might also instinctively curl your right leg up toward your chest. Straightening or extending the right hip can provoke pain when the appendix is inflamed near the muscles deep in the pelvis. If you notice that lying on your left side with your right leg extended makes the pain worse, that’s a significant clue.
Symptoms That Accompany the Pain
Appendicitis rarely presents as pain alone. As the abdominal pain intensifies and migrates, nausea and vomiting typically follow. The sequence matters: with appendicitis, pain almost always comes first, then nausea. (With a stomach virus, nausea and vomiting usually show up before any significant pain.)
Up to 40% of people with appendicitis develop a fever, signaling that the immune system is ramping up its response or that the inflammation is spreading. Loss of appetite is nearly universal. Some people also develop constipation or, less commonly, diarrhea. The combination of lower right abdominal pain, nausea, low appetite, and a mild fever is the classic cluster that prompts emergency evaluation.
Why Timing Matters
An inflamed appendix can rupture as soon as 48 to 72 hours after symptoms begin. A rupture spills bacteria into the abdominal cavity, which can cause a widespread, dangerous infection. This is why appendicitis is treated as an emergency. The pain doesn’t need to be the worst you’ve ever felt to warrant urgent care. Steadily worsening pain in the lower right abdomen, especially with nausea or fever, is reason enough to head to the emergency room.
Interestingly, some people experience a brief period of relief right after a rupture, because the pressure inside the appendix drops. This temporary improvement is misleading. The pain returns, often worse and more spread out across the entire abdomen, as infection takes hold.
Other Causes of Right-Sided Abdominal Pain
Not all lower right abdominal pain is appendicitis. Several other conditions land in the same neighborhood. Inflammatory conditions affecting the end of the small intestine (such as Crohn’s disease) can produce similar pain, as can infections in the area where the small and large intestines meet. Ovarian cysts, ectopic pregnancies, and kidney stones on the right side can also mimic appendicitis. In older adults, a right-sided diverticulitis or even a tumor occasionally presents the same way.
The key distinguishing features of appendicitis are the pain migration pattern (center to lower right), the rebound tenderness, and the steady escalation over hours. If your pain came on suddenly in one fixed spot, or if it’s been recurring for weeks, the cause is more likely something else. Imaging in the emergency room, typically a CT scan or ultrasound, can usually distinguish appendicitis from these other possibilities with high accuracy.