Hi T.!
When my daughter had them, and doctor told us about possible cause, I did a research on this topic. First, we were not sure, and tried to give her Tylenol, tried to calm her down - but she used to become even more upset and loud. :( They say, night terrors happen quite often among children, and they have nothing to do with watching scary movies, or something similar. Supposedly it is some process that happens in the brain during sleep (usually first or second hour) which makes you "wake up" - well, not really even wake up... Anyone - children or adults - can get them. Usually person does not recall these episodes, but some do. Episodes appear and then suddenly go away. Like in my oldest daughter's case, when she was about 2, terrors lasted only a couple of weeks, maybe 4-5 episodes total, and not every night.Then everything was gone. Now she is 5, and terrors never came back. One of the possible reasons (although nobody knows for sure) could be being overtired, stress during the day, irregular bowel m., or late dinner. There is no specific treatment. But if it becomes VERY bothersome and frequent, and if you notice WHEN your daughter wakes up, how soon after going to bed, you may try to wake her up BEFORE that time, to interrupt her sleep cycle where night terror happens. The main thing during an episode of night terror is to stay calm, and if your child seems "out of it" and cries, don't get upset too much. She will go through it!!! Hope this helps. Sorry that you have to deal with it. Good luck!