Your lower right abdomen contains several organs and structures, any of which can be the source of pain or discomfort. The main contents include the appendix, the beginning of the large intestine (cecum), the end of the small intestine, the right ureter, and in women, the right ovary and fallopian tube. The right iliac artery, which supplies blood to your leg, also runs through this area.
The Appendix
The appendix is the organ most people think of when they feel pain in the lower right abdomen, and for good reason. It sits in this quadrant attached to the cecum, the pouch-like beginning of your large intestine. The lifetime risk of appendicitis in the United States is about 1 in 15, with adolescents and males being diagnosed more often.
Appendicitis pain typically starts vaguely around the belly button, then migrates over several hours to a very specific spot: a point roughly one-third of the way along an imaginary line drawn from your right hip bone to your belly button. This is called McBurney’s point, and tenderness there is one of the hallmark signs. Other symptoms include loss of appetite, nausea or vomiting, and a low-grade fever. Severe or sudden pain in this area, especially with fever or vomiting, warrants an emergency room visit.
The Cecum and Large Intestine
The cecum is about 3 inches long and serves as the gateway between your small and large intestines. Digested food waste empties into it from the small intestine, and it pushes that material upward into the ascending colon, which runs along the right side of your abdomen. Problems here can range from constipation and gas buildup to more serious conditions like inflammatory bowel disease, colon polyps, or bowel obstruction. Irritable bowel syndrome can also cause cramping that localizes to this area, particularly if gas tends to collect in the cecum.
The Small Intestine
The very end of the small intestine, called the terminal ileum, empties into the cecum in the lower right quadrant. This segment is a common site for Crohn’s disease, a type of inflammatory bowel disease that causes chronic pain, diarrhea, and sometimes weight loss. Infections and inflammation here can mimic appendicitis because the pain is in the same general location.
The Right Ovary and Fallopian Tube
In women, the right ovary and right fallopian tube sit in the lower right abdomen. Ovarian pain is usually felt below the belly button, in the pelvis, or radiating into the lower back. Several conditions specific to these organs can cause sharp or persistent pain in this quadrant.
Ovarian cysts are fluid-filled sacs that form on or inside the ovary. Most are harmless and resolve on their own, but a ruptured cyst can cause sudden, sharp pain. Ovarian torsion, where the ovary twists on its blood supply, causes severe and sudden pain that typically requires emergency surgery. An ectopic pregnancy, where a fertilized egg implants in the fallopian tube instead of the uterus, can produce lower abdominal pain along with vaginal bleeding and fatigue. Ectopic pregnancy is a medical emergency if the tube ruptures.
The Right Ureter and Bladder
Your right ureter is a thin muscular tube connecting your right kidney to your bladder. It passes through the lower abdomen on its way down, and a kidney stone that gets stuck in the lower portion of the ureter can cause intense, wave-like pain that radiates from the back and side into the lower belly. Other symptoms include burning during urination, bloody or discolored urine, nausea, and a frequent urge to pee that produces very little output. Small stones near the bladder often pass on their own within a few days once they reach the bladder. Larger stones may need medical intervention.
A portion of the bladder also sits in the lower right quadrant. Urinary tract infections or bladder inflammation can produce pressure or pain in this region, often accompanied by frequent, painful urination.
Inguinal Hernias
Not all lower right abdominal pain comes from an internal organ. An inguinal hernia occurs when tissue, often a loop of intestine, pushes through a weak spot in the abdominal wall near the groin. The telltale sign is a visible or palpable bulge in the groin area, along with discomfort, heaviness, or a burning sensation. Symptoms tend to get worse when you strain, lift, cough, or stand for long periods, and they improve when you lie down.
Most inguinal hernias are not emergencies, but they can become one. A hernia that suddenly gets larger, turns red, becomes very painful, or can no longer be pushed back in may be strangulated, meaning its blood supply is being cut off. Nausea, vomiting, and bloating alongside a painful hernia bulge are signs to seek immediate care.
Muscles and Blood Vessels
The right iliac artery, a major blood vessel supplying the right leg, runs through this quadrant. Problems with this artery are uncommon but can cause deep pain or changes in circulation to the leg. More often, pain in this area turns out to be muscular. A strained abdominal muscle or hip flexor can produce soreness that worsens with movement, coughing, or twisting, and is sometimes mistaken for organ pain.
When Lower Right Pain Is an Emergency
Severe pain in the lower right abdomen should be evaluated promptly. The following symptoms alongside pain signal something potentially serious: pain that started mild but is steadily worsening, fever or chills, vomiting blood, blood in your urine or stool, pain that spreads toward your chest or shoulder, yellowing of the skin or eyes, or unexplained weight loss. Pain that doesn’t go away or keeps coming back also deserves medical attention, even if it isn’t severe.