What Could Cause Swelling in the Lower Right Abdomen Without Pain?

While many conditions in the right lower abdomen typically cause pain, there are several benign or subclinical causes that might present solely as a palpable swelling without significant discomfort:

• Non-tender Hernia: A small hernia (such as an incisional, umbilical, or inguinal hernia) might protrude in the lower right quadrant. When not incarcerated or strangulated, these hernias can present as a visible or palpable bulge without pain.
• Lipoma: Lipomas are benign tumors composed mainly of fat. They tend to feel soft to firm and are usually not painful. A lipoma in the abdominal wall may be noted as a swelling that doesn’t cause discomfort.
• Cystic Lesions: Cysts within the abdominal wall or related to internal structures can sometimes be asymptomatic aside from appearing as a lump.
• Residual Mesenteric Lymphadenopathy: Sometimes, after a mild or resolved infection, the mesenteric lymph nodes (which are in the lower abdomen) might remain slightly enlarged. Though mesenteric adenitis is typically painful when acute, persistent lymphadenopathy can occasionally be detected incidentally without current pain.
• Non-tender Hernia: A small hernia (such as an incisional, umbilical, or inguinal hernia) might protrude in the lower right quadrant. When not incarcerated or strangulated, these hernias can present as a visible or palpable bulge without pain.
• Lipoma: Lipomas are benign tumors composed mainly of fat. They tend to feel soft to firm and are usually not painful. A lipoma in the abdominal wall may be noted as a swelling that doesn’t cause discomfort.
• Cystic Lesions: Cysts within the abdominal wall or related to internal structures can sometimes be asymptomatic aside from appearing as a lump.
• Residual Mesenteric Lymphadenopathy: Sometimes, after a mild or resolved infection, the mesenteric lymph nodes (which are in the lower abdomen) might remain slightly enlarged. Though mesenteric adenitis is typically painful when acute, persistent lymphadenopathy can occasionally be detected incidentally without current pain.

Although these conditions can generally be managed conservatively if they aren’t causing any discomfort or complications, it is still wise to have any newly discovered swelling evaluated by a healthcare provider. They may recommend a physical exam and imaging studies, such as an ultrasound or CT scan, to accurately diagnose the cause and decide whether any treatment is needed.