Lower right abdomen pain can signify a severe problem like appendicitis, or a more benign (harmless) problem like gas or spicy food that resolves in time or responds to self-care. Contact your healthcare provider if you have pain that persists. “Pain On right side” refers to pain in the right side of the chest or abdominal area. The right side of the human body contains many vital organs, including the lungs, kidneys, liver, pancreas, and large intestine. Some diseases, inflammation, or infection in any organs can cause pain. Understanding right-sided abdominal pain involves considering potential causes like appendicitis, gallstones, or kidney stones for proper evaluation and treatment. The most common causes of right side abdominal pain are gallstones or biliary colic, acute appendicitis, hepatitis, cholecystitis, and liver diseases. Sometimes, causative factor of right sided abdominal pain may also cause left sided abdominal pain.