Threadwords – or pinworms, as they’re sometimes known – are small white worms that can be found in your child’s poo or around their anus. (I really hope you’re not having breakfast while reading this.

I don’t mean to alarm you but the kids are back at school and nursery, which means parents need to be on the lookout for nits and (I’m so sorry) worms. Specifically threadworms, which – I didn’t ...