I have suffered from pain under my right boob along the rib cage for about 6 years. It is very intermittent comes about every 3 months for about a week. The pain is by no means severe but is like a dull Sharp ache and sometimes I can find the exact spot by pressing on it. There is no rhyme and reason to when it comes. Have been to GP and he diagnosed costocondritis. Just wondered if anyone else suffers with this and knows what causes it. Thanks