I've been reading loads of threads on here about the joys of constipation and movicol, but I haven't noticed anyone else mentioning the tummy aches. My ds ( 3) is on the movicol and it is working in as far as its keeping him cleared out, but every night for about 3 hours he lies there wimpering with tummy pain. He was doing this before the movicol, I guess he's stretched his bowel and its quite sore. but now I have no idea whether to increase the dose to make things pass through more easily or whether its the movicol that is causing the cramping now. i can cope with the pant soiling and painful poos but this tummy ache is relentless . he is very run down from lack of sleep..Anyone else had this?