Why sleepwalker be woken up?

Sleepwalkers should not be woken up abruptly, as this can startle them and cause confusion and disorientation. Waking a sleepwalker suddenly can also cause them to become agitated or even aggressive. If you need to wake a sleepwalker, it's best to do so gently and calmly. You can try gently shaking or calling their name until they start to stir. Once they're awake, try to keep them calm and help them orient themselves to their surroundings.