What to do if i have dull pain below the right rib cage?

Muscle strain: You could have pulled a muscle. On the other hand, this could be from something under the chest or abdominal wall. Try a warm compress or ice pack. If symptoms persist, X rays, labs and possible Cat scan of abdomen and chest may be needed at your doctor's discretion

See a doctor for-: -evaluation. Tests may be needed as well as a hands on exam, ,aswell as a good history. The causes can be many there are so many organs in that area as well as possibility of referred pain