“Waking a sleepwalker is dangerous.”

The widespread belief that waking a sleepwalker can cause them severe harm, such as a heart attack or brain damage, is a persistent myth. In reality, rousing someone from a sleepwalking episode poses no such dire physical health risks. The true concern, however, lies in the potential for immediate disorientation. An abrupt awakening can leave a sleepwalker confused, agitated, or even startled, which could, in turn, lead to accidental injury if they stumble or react impulsively.

The origins of this misconception are likely rooted in a historical lack of understanding about sleep and somnambulism, often leading to dramatic and exaggerated interpretations. Fictional depictions in popular culture have frequently reinforced the idea of a sleepwalker as fragile and prone to extreme reactions if disturbed, further embedding this dramatic warning into public consciousness. Scientifically, there is no evidence to support the claim that waking a sleepwalker causes any lasting physiological damage.

People commonly believe this myth partly due to a natural human inclination to avoid disturbing someone in a vulnerable or altered state. The observed disorientation and confusion a sleepwalker experiences upon sudden awakening may have been misinterpreted over time as proof of a more serious underlying danger, rather than a temporary consequence of being abruptly pulled from a deep sleep cycle. Therefore, while extreme health risks are unfounded, the recommendation to gently guide a sleepwalker back to bed is still practical advice, prioritizing their immediate safety and comfort.