Revised May 20, 2016
When was the last time you had trouble sleeping? Too much caffeine, emotional stress, loud neighbors, or the anticipation of leaving on a trip can all interfere with a good night’s rest. But if you frequently have trouble going to sleep or staying asleep, you can count yourself among the one-third of Americans who suffer from insomnia. In the US, insomnia is the third most common health complaint after headaches and colds.