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.
1 Place the green beans in the boiling water. 2  They should be completely immersed. ( 3 If you have a large amount of beans to freeze, place the beans in a colander or large strainer that will fit inside your stockpot.... or use a large pasta-type pot with a fitted basket. Keep the water at a continuous boil for 3 to 3-1/2 minutes. 2  Remove the beans from the boiling water and immediately place the beans in a large pot or bowl of ice water. 3  Cooling time should also be about 3 to 3-1/2 minutes. 4  When completely cool, drain the beans in a colander or large strainer.