Right side upper abdomen pain under rib cage causes?

Multiple: Possibilities are numerous 1 gallbladder attacks 2.Musculoskeletal--rib pain 3. Lung problem--infection , clot etc should see an md to be examined and take more extensive history.

Possibilities: Ruq abdomen is home to the liver, gall bladder, small intestines, diaphragm. Gall bladder stones, duodenal ulcer, pneumonia, hepatitis, and sometimes atypical appendicitis can cause RUQ pain. Persistent pain warrants immediate evaluation by doctor.