Hi. Has anyones children experienced a sore belly after taking ovex for threadworms? My 8 year old had treatment last weds after complaining of a sore bum for a few nights. By sat night he had a really sore belly and started with diarrhoea on Sunday. I had him at out of hours and later A&E as we were worried it might have been appendicitis but they said it wasn't. He is still complaining of a sore belly off and on now although the diarrhoea has stopped. Anyone else experienced this?? TIA.