67% of us experience parasomnias — expert shares 5 most common types and why they happen

A man asleep experiencing sleep paralysis shown by a shadow of his body waking up.

Experiencing a parasomnia, like sleep walking, can feel disturbing. Sleepwalking isn’t the only parasomnia, though — other sleep conditions such as sleep paralysis, bed wetting and even sleep talking can be classed as a parasomnia.

So what causes them? From stress and trauma, to lifestyle habits and medications (or even genetics) — there are many factors that can be responsible for parasomnias.