What causes someone to fall out of bed while sleeping?

Falling out of bed while sleeping can be caused by several factors, including restless sleep, sudden movements, or an unstable sleep environment. Conditions like sleep disorders (e.g., sleepwalking or REM sleep behavior disorder) can increase the likelihood of such incidents. Additionally, sleeping on a soft or high mattress without proper bedrails may contribute to the risk. Other factors, such as intoxication or muscle weakness, can also play a role.