For over a year I've had a rubber band feeling and tightness under the breast (rib cage). I only have this when sitting in my recliner or laying down. No pain, just tightness; what could this be?
Probably several hundred different conditions could cause this tightness. As a rule of thumb, if you know you have a problem and it's not getting better of it's own, then it's better to seek professional advice.
What's needed is a good examination.
Dr B
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