My 22 month old daughter has been going through spells over the last few months that I thought were boughts of constipation- now I am not so sure. She will lay down on her side in an almost fetal position (a little straighter), cross her ankles, tense her leg muscles, put her hands between her knees, grunts, and seems out of breath. She works up a sweat and can do this for a long time (sometimes an hour). She can stop at will. If I leave the room- she jumps up to follow (as always). It would happen once or twice a week, and I thought it was constipation until she did it right after a bm the other day. Now I just don't know. Then I thought seizures? But she can stop when she wants and it only happens at home that I know of. Please let me know if you have seen anything like this. Thanks!