The Cleveland Clinic offers some tips for parents whose children suffer from night terrors.

Night terrors may be over in a few seconds or may last several minutes. They have no pattern, striking once a week, a few times a year, or — in rare cases — several times a week.

Cousin to the night terror is another behavior disorder: sleep-walking. “Sleep-walkers can often navigate the familiar home environment,” says Dr. Shah. “But when you call them, they won’t respond or won’t remember in the morning. Or they’ll say something nonsensical because they’re not awake.”

What’s a parent to do?