Why sleep trackers can sometimes worsen insomnia, what orthosomnia is, and how to trust your own experience of sleep again.

Sleep hygiene is sensible advice. It's also not a treatment for chronic insomnia and presenting it as one can make things worse, not better. If you've ever felt that quiet unease after handing someone with significant sleep difficulties a sleep hygiene leaflet, wondering whether it was really going to help, this piece is for you