Why Is My Lower Right Side Hurting Common Causes?

Pain in your lower right side can feel alarming, and your first thought might be appendicitis. While that is a common cause, it is far from the only one. The lower right abdomen contains parts of your small and large intestines, your appendix, and in women, the right ovary and fallopian tube. Muscle strain, kidney stones, and even gas can cause pain in this exact spot. The key is knowing which causes are serious and which are not.

Your body sends pain signals for a reason. Sometimes the reason is simple and resolves on its own. Other times it signals a problem that needs medical attention quickly. This article walks through the most common causes of lower right side pain based on current medical evidence. It will help you understand what might be happening and when to seek help.

What Is Causing My Lower Right Side Pain?

Your lower right abdomen holds several organs. Pain in this area can come from any of them. The most well-known cause is appendicitis, but many other conditions produce similar pain.

Appendicitis is inflammation of the appendix. It usually starts as a dull ache near the belly button and moves to the lower right side within 24 hours. The pain gets sharper and worse with movement, coughing, or sneezing. You might also have nausea, vomiting, loss of appetite, or a low fever. If you have these symptoms together, you need emergency care. A ruptured appendix can be life-threatening.

Kidney stones can cause pain that radiates from your back or side down into your lower abdomen. The pain comes in waves and can be intense. You might also see blood in your urine or feel a strong urge to urinate. Not all kidney stones need treatment, but large ones do.

Gas and constipation are very common and often overlooked. Trapped gas in the colon can cause sharp, stabbing pains that come and go. Constipation causes a dull, crampy ache. These pains usually resolve after a bowel movement or passing gas. They are uncomfortable but not dangerous.

Ovarian cysts are fluid-filled sacs on the ovary. Most are harmless and go away on their own. But a large cyst or one that ruptures can cause sudden, sharp pain on the lower right side. You might also feel bloated or have pelvic pressure.

Could It Be Something Other Than My Appendix?

Many people assume lower right pain equals appendicitis. That is not always true. Several other conditions cause pain in the same spot and are often mistaken for it.

Irritable bowel syndrome (IBS) causes cramping and bloating that can be worse on one side. The pain often improves after a bowel movement. IBS does not damage the intestines, but it can be very uncomfortable. It is a chronic condition that requires diet and stress management.

Urinary tract infections (UTIs) can cause pain in the lower abdomen, including the right side. You will likely also have burning when you urinate, frequent urges, or cloudy urine. UTIs are common and treatable with antibiotics.

Hernias occur when tissue pushes through a weak spot in the abdominal wall. An inguinal hernia appears as a bulge near the groin on the right side. It may cause a dull ache or sharp pain when you lift something or strain. Some hernias need surgery, others can be monitored.

Endometriosis is a condition where uterine-like tissue grows outside the uterus. It can cause chronic pelvic pain that is worse during your period. The pain may be on one side only. Diagnosis often takes years, but treatment options exist.

Current research suggests that about one in three people who go to the emergency room for lower right abdominal pain do not have appendicitis. They have one of these other conditions instead. That is why doctors do tests like CT scans or ultrasounds before deciding on surgery.

When Should You Go to the Emergency Room?

Some causes of lower right pain are emergencies. Others are not. Knowing the difference can save you time and worry. Here is when you need immediate medical attention.

Go to the ER if your pain is severe and sudden. If it came on fast and is the worst pain you have ever felt, do not wait. Also go if you have a fever above 100.4°F (38°C) along with the pain. This combination suggests an infection like appendicitis or a kidney infection.

Other red flags include vomiting that will not stop, blood in your stool or urine, or a swollen belly that feels hard to the touch. If you cannot pass gas or have a bowel movement, that is also a sign of a blockage. These symptoms mean something serious is happening inside your abdomen.

If you are pregnant and have lower right pain, call your doctor or go to the ER. Ectopic pregnancy can cause pain on one side and is life-threatening if not treated quickly. Do not assume it is just gas or round ligament pain.

For mild pain that comes and goes, you can usually wait and see. If it lasts more than a few days or gets worse, see your regular doctor. They can run tests to figure out the cause.

What Does Research Show About Common Causes?

Medical research has mapped out the most frequent reasons for lower right abdominal pain. Studies have found that appendicitis is the cause in about 30 percent of cases that come to the emergency room. But that number varies by age and sex.

In younger women, ovarian and gynecological causes are more common than appendicitis. A 2020 study in the Journal of the American College of Surgeons found that women aged 15 to 45 were more likely to have ovarian cysts or pelvic inflammatory disease than appendicitis when they had right-sided pain. This is an important point because many women assume their pain is from the appendix and are surprised when tests show otherwise.

In older adults, diverticulitis becomes more common. Diverticulitis is inflammation of small pouches in the colon wall. It usually causes pain on the lower left side, but some people have it on the right. It can mimic appendicitis closely.

As of 2026, imaging technology has improved how doctors diagnose these conditions. CT scans are very accurate for appendicitis, but they expose you to radiation. Ultrasound and MRI are safer alternatives that work well for many patients. Doctors increasingly use ultrasound first, especially in children and pregnant women.

One non-obvious finding from research is that the classic “migrating pain” of appendicitis does not happen in everyone. About half of people with appendicitis never feel the pain move from the belly button to the right side. They just have steady pain in the lower right area from the start. Relying on that symptom alone can delay diagnosis.

What Can You Do at Home for Mild Pain?

If your pain is mild and you do not have any red flags, you can try some home remedies. These will not fix a serious condition, but they can help with gas, constipation, or muscle strain.

• Rest in a comfortable position. Lying on your left side can help gas move through your colon.
• Apply heat with a warm compress or heating pad on low setting. Do not use heat if you have a fever or swelling.
• Drink water slowly. Dehydration can make constipation worse.
• Eat light foods like crackers or toast. Avoid greasy, spicy, or heavy meals until the pain passes.
• Try over-the-counter pain relievers like acetaminophen. Avoid ibuprofen or aspirin if you suspect appendicitis, as they can mask symptoms and increase the risk of rupture.
• Walk gently to encourage bowel movements. Do not push yourself if walking hurts more.

If these measures do not help within 24 hours, or if the pain gets worse, see a doctor. Home care is only for mild, temporary pain that you are confident is not serious.

One thing to avoid is taking laxatives for constipation if you also have pain. Laxatives can cause cramping that makes it hard to tell if the pain is from constipation or something else. Stick to water, fiber, and gentle movement.

Common Misconceptions About Lower Right Pain

Many ideas about abdominal pain are not backed by evidence. Some of them can even be dangerous if they delay proper care.

Misconception: If you can jump without pain, it is not appendicitis. This is widely claimed on social media. The truth is that some people with early appendicitis can jump, walk, and even exercise without pain. The “jump test” is not reliable. Do not use it to decide whether to see a doctor.

Misconception: Lower right pain always means surgery. Many causes of lower right pain do not require surgery. Ovarian cysts, kidney stones, UTIs, and most hernias can be treated without an operation. Even some cases of appendicitis are now treated with antibiotics alone, especially in mild cases. Surgery is common but not automatic.

Misconception: Gas pain is always harmless. Gas pain is usually harmless, but severe gas pain can mimic serious conditions. If you have a fever, vomiting, or a hard belly along with gas pain, do not assume it is just gas. Let a doctor decide.

Misconception: You will know if your appendix ruptures. A ruptured appendix causes severe pain at first, but then the pain may actually decrease for a short time. This happens because the pressure inside the appendix is released. The relief is temporary and dangerous. If you had severe pain that suddenly got better, go to the ER anyway.

These myths spread because they sound logical. But medical reality is more complicated. When in doubt, let a professional examine you.

What Tests Will the Doctor Do?

If you see a doctor for lower right pain, they will start with a physical exam. They will press on your abdomen to find the exact spot that hurts. They will check for rebound tenderness, which is pain that increases when they quickly remove their hand. This is a classic sign of appendicitis.

Blood tests are standard. A high white blood cell count suggests infection. C-reactive protein is another marker of inflammation. These tests are not perfect, but they give clues.

Urine tests check for infection, blood, or kidney stones. A pregnancy test is routine for women of childbearing age to rule out ectopic pregnancy.

Imaging is often needed. Ultrasound is good for seeing the appendix, ovaries, and gallbladder. CT scans are more detailed and are the gold standard for diagnosing appendicitis. MRI is used when radiation should be avoided, such as in pregnancy.

Sometimes doctors do a diagnostic laparoscopy. This is a small surgery where a camera is inserted through a tiny cut in your belly. It lets the surgeon see the organs directly. If appendicitis is found, the appendix can be removed during the same procedure. This is not common for initial diagnosis, but it is used when other tests are unclear.