If you place your hand on the right side of your belly, just under the ribs, you are resting your palm over the largest internal organ in the human body: the liver. The liver sits in the upper right part of the abdomen, tucked mostly behind the lower ribs, and it is the main organ people mean when they ask what organ is on the right side of the body.
But the right side holds more than the liver. The gallbladder, the right kidney, part of the large intestine, the appendix, and the right lung all sit on that side too. Which one is causing a problem depends on where the symptom is and what it feels like.
What Organs Are Located on the Right Side of the Body?
The right side of the body contains organs from two different spaces. Some sit in the chest, above the diaphragm. Others sit in the abdomen, below it. The diaphragm is the muscle sheet that separates the two.
In the chest, on the right side, you have the right lung. It has three lobes, while the left lung has two. The extra lobe exists because the heart takes up space on the left side.
In the abdomen, the right side holds several organs:
- Liver — the largest organ inside the body. It fills most of the upper right abdomen, protected by the rib cage.
- Gallbladder — a small pear-shaped sac tucked under the liver. It stores bile.
- Right kidney — sits behind the liver, higher than most people expect.
- Large intestine — the ascending colon runs up the right side of the abdomen.
- Appendix — a small tube attached where the small and large intestines meet, in the lower right abdomen.
- Right ureter — the tube that carries urine from the right kidney to the bladder.
- Right ovary and fallopian tube — in people with female reproductive anatomy.
Most of these organs are partly or fully protected by the lower ribs. That is why a problem in the liver or gallbladder often feels like it is coming from the rib area rather than the belly.
Where Exactly Is the Liver and What Does It Do?
The liver sits in the upper right abdomen, mostly under the rib cage. In a healthy adult it weighs around 3 pounds, making it the heaviest internal organ. A small part of it crosses the midline into the upper left abdomen.
The liver does hundreds of jobs. The major ones are well established:
- It filters blood coming from the digestive tract before that blood moves to the rest of the body.
- It makes bile, a fluid that helps break down fats.
- It stores sugar as glycogen and releases it when blood sugar drops.
- It builds proteins, including those involved in blood clotting.
- It breaks down and clears many drugs, alcohol, and other substances.
One detail that surprises many people: the liver is the only internal organ that can regrow lost tissue. If part of it is removed, the remaining tissue can grow back to near its original size. This regrowth is real and well documented, but it does not mean the liver is immune to permanent damage. Repeated injury from alcohol, viruses, or other causes can leave scar tissue that does not recover.
What Causes Pain on the Right Side of the Abdomen?
Pain on the right side has many possible causes, and the location gives useful clues. Doctors often divide the abdomen into upper and lower right sections, because the likely causes differ.
Upper right abdominal pain often points to the liver, gallbladder, or the bile ducts. Gallstones are a common cause. When a stone blocks a duct, it can cause steady pain that may spread to the right shoulder or back. Liver inflammation from infection, alcohol, or other causes can also produce a dull ache in that area.
Lower right abdominal pain has a different list. Appendicitis is the classic concern. It often starts as a vague discomfort around the navel and then settles in the lower right abdomen. The ascending colon, the right kidney, and the right ovary or ureter can also be sources.
Kidney problems tend to cause pain in the back or flank rather than the front of the belly. The right kidney sits high and toward the back, so a kidney stone or infection often feels like it is coming from the side or lower back.
Because so many organs share this space, pain location alone cannot identify the cause. This is why a medical evaluation matters when right-sided pain is severe, sudden, or getting worse.
What Symptoms Suggest a Problem With an Organ on the Right Side?
Symptoms vary by organ, but a few patterns are worth knowing.
Liver problems can be silent for a long time. When symptoms appear, they may include fatigue, yellowing of the skin or eyes, dark urine, or swelling in the abdomen. Many liver conditions cause no pain at all until they are advanced.
Gallbladder problems often cause pain after eating fatty meals. The pain can be sharp and may last from minutes to hours. Nausea and vomiting sometimes come with it.
Appendicitis usually causes pain that worsens over time, often with loss of appetite, nausea, and a low fever. The pain tends to move and then settle in the lower right abdomen.
Kidney problems can bring blood in the urine, pain in the back or side, fever, or changes in urination.
None of these patterns is specific enough to confirm a diagnosis on its own. A symptom that fits one organ can sometimes come from another. That overlap is exactly why imaging and lab tests are used.
What Is on the Right Side but Often Forgotten?
People usually think of the liver first, but a few structures on the right side get overlooked.
The gallbladder is small but notorious. It stores bile made by the liver and releases it when you eat. Gallstones are common, and many people who have them never feel anything. Problems arise when a stone blocks the flow of bile.
The appendix is a narrow tube with no clearly established function in humans. It can become inflamed, which is a medical emergency. The appendix sits in the lower right abdomen, which is why appendicitis pain shows up there.
The right kidney sits higher than the left one, because the liver takes up space above it. This difference in position matters when doctors interpret imaging or examine the abdomen.
The ascending colon carries waste upward on the right side before it crosses the abdomen. Conditions affecting this section can cause right-sided belly symptoms.
When Should You Take Right-Sided Symptoms Seriously?
Most right-sided aches are not emergencies. But some symptoms need prompt medical attention, and it is better to be checked than to wait.
Seek care right away for severe or sudden pain, pain that keeps getting worse, a rigid or tender belly, yellowing of the skin or eyes, vomiting blood, or blood in the stool. Fever with right-sided pain also deserves a prompt evaluation.
For milder symptoms, a medical visit is still reasonable if pain lasts more than a few days, keeps coming back, or comes with weight loss, fatigue, or changes in digestion.
No article can replace an exam. The right side of the abdomen holds several organs packed close together, and telling them apart usually requires a hands-on assessment, blood tests, and sometimes imaging. The value of writing this down is simple: knowing what lives on your right side helps you describe your symptoms clearly and understand what your doctor is checking for.
Frequently Asked Questions
What organ is on your right side under the ribs?
The liver is the main organ in the upper right abdomen, sitting mostly behind the lower ribs. The gallbladder and right kidney are also in that area.
What organ is on the lower right side of your body?
The appendix, the ascending colon, and the right ovary or ureter sit in the lower right abdomen. Appendicitis is the most common concern when pain settles there.
Can liver problems cause pain on the right side?
The liver itself has few pain nerves, so many liver conditions cause no pain until they are advanced. When pain does occur, it is often from the liver’s outer covering stretching, which can feel like an ache under the right ribs.
Is the kidney on the right or left side?
You have a kidney on each side. The right kidney sits a bit lower than the left because the liver takes up space above it.
