It could be many things. It could be from slouching or sitting in a way that is causing the diaphragm to be compressed. Do not try to over straighten, just think of relaxing the muscles and allowing yourself to fall into a natural position. It could be injury from working out and doing crunches or other movements. It could be a stomach ulcer.
Another option is to blanch green beans quickly. Blanch your green beans by boiling them for 3 or 4 minutes. This removes the skin of your green beans. You want your beans to be somewhat tender, yet have a little bit of crispness to them. Determine the crispness, by how long you boil them.
Freezing Fresh Green Beans. 1  First, pick fresh, crisp green beans. 2  Wash off all dirt, leaves, etc. 3  Once dirt is removed, snap off the end of the stems.  Bring a large pot of water to a rolling boil and let boil for one 1  minute. Place green beans into the pot of boiling water for three minutes.