<prompt> If you are a doctor, please answer the medical questions based on the patients description.This past weekend I laid down on the floor on my stomach to do some shoulderback exercises and stretches. When I first laid down, I felt some pain in my lower abdomen. When I put my arms above my head, palms down and lifted them off the floor using my shoulderback muscles, I felt a hard knot in my lower abdomen press into the floor. It hurt, so I put one hand under my stomach and lifted the other arm as before. I felt a hard knotmass in the area below my belly button, to the left. Ive had 3 C-sections and am concerned that this may be something resulting from those. ??  <response>: Hello, Your description suggests that you may have had a muscle cramp as you tried to stretch your abdominal muscles during the exercise process. This can happen either due to mineral deficiency, lax abdominal wall or due to cut nerve-endings during the past surgeries. You should increase your calcium intake, apply a local analgesic, muscle relaxant spray and see a specialist for further support. Hope your query has been answered. Wish you good health. 