Several things can lead to sleepwalking.
It can run in the family. Identical twins are more likely to sleepwalk. If you have a parent, brother, or sister who sleepwalks, you're 10 times more likely to do so than someone from a family with no sleepwalkers.
You might also have the disorder if you're:
- Sleep deprived
- On a chaotic sleep schedule
- Stressed
- Drunk
- Taking drugs such as sedative-hypnotics (which promote relaxation or sleep), neuroleptics (used to treat psychosis), stimulants (which boost activity), and antihistamines (used to treat symptoms of allergy)