S.B.
Well, the left side of the body is home to the stomach, spleen, and sigmoid colon, also the left kidney. The way you describe her pain, could it be gas? That would be my first thought, because you say it passes quickly and doesn't hurt to touch her. Try taking note of what she eats and drinks, her bowel movements, and her activities just before the pain strikes if possible. Write it down, and take it with you to the doctor. Be as specific and detailed as possible. Then you can see if this is truely random, or if it seems to be related to something in her routine. This will help tremendously in getting an accurate diagnosis, especially since it's unlikely the pain will strike her when you are actually at the doctor's office. Good luck!