Thread worms are thriving everyday in the bottoms of little children and affecting their daily activities and causing sleepless nights for many families. It's not a nice experience but easily identified and treated. I am frequently finding worms a problem for our little pre-school aged non-sleepers and mum and dad are horrified. Worms are spread very easily in the community across all social backgrounds and generations. They are spread most commonly in pre-schoolers' because in my experience the only things toddlers share are germs (and love) and this age group are not always efficient at hand washing, particularly before eating.