causes of ruq pain
Causes of Upper Right Abdominal Pain. Right upper quadrant pain can have a variety of causes. These causes are usually related to the underlying organ, tissue, muscle, or, rarely, bone. Pain can be referred to the right upper quadrant from several different places outside of the abdomen. Liver Disorders. Possible causes of upper right abdominal pain can include liver disease. Hepatitis A is one of those causes of right upper quadrant pain that comes from consumption of food contaminated by feces, usually by an infected food preparer who has not washed their hands after using the bathroom.