If you use this routine please leave all comments in place so that others may benefit as well. 1- transient, which lasts any thing from a few nights up to 4 weeks. 2- chronic ,which can last for years. 3-those who wake up in the early hours of the morning and cannot go back to sleep. Medication most doctors today prefer to discover whats causing sleeplessness rather than prescribe sleeping tablets.
Therapy varies depending on the cause.