Very sorry for TMI.
We've discovered this evening that DD (6) has threadworms. We discovered it because she has nasty constipation with lots of mucus, and we were sitting next to her to comfort her while she was on the loo. Could I ask - when your DC have had worms, do they also get constipated, or is that a separate issue? I can't find very much on the internet to suggest that constipation is a common symptom.