Sleepwalking can be caused by many factors, including genetics, a chaotic sleep schedule, and alcohol consumption. According to WebMD, there is no foolproof way to prevent sleepwalking, although you can take certain steps like getting adequate sleep, reducing stress, and avoiding stimuli before bedtime to minimize your risks. Thankfully, it's not considered a serious disorder, and can usually be remedied with some relaxation and stress management therapies. And although startling, it is OK to wake a sleepwalker, but it's better to just calmly guide them back to bed.
In terms of sleep-talking, it can be caused by certain medications, emotional stress, a fever, a mental health disorder, or substance abuse. It is often harmless, although it may be a sign of a more serious health condition or sleep disorder.
What's your experience with either of these sleep conditions?