I agree with Birdgirl. Diet and exercise. Down the chest center is usually colon, when I've been seen by emergency while having those pains acutely, I have been diagnosed with ulcers, colonitis, spastic colon (and possible IBS), and acid reflux disease.

Yoga is a very effective exercise for all these problems.

And altho not intoxicating, eating a dose really helps to relax too.