Yesterday I thought that I would enjoy the sun and lie on the grass and read at lunchtime. Whilst I was there I sneezed. Now, I have found in the past that it hurts my stomach to sneeze when I am lying flat. Normally, I manage to curl up in time but yesterday I didn't. It hurt so much. I felt that I pulled muscles that I didn't know I had. I still have some pain on my left side from it. Have I damaged myself permanently? What is happening to my body that a simple sneeze would cause such excruciating pain.