Sleep is a common problem. Most people dealing with traumatic brain and spinal cord injuries, ADD-ADHD, chronic medical conditions and injuries and more, have difficulty with sleep. I recommend clicking on the highlighted red link to Sleep Struggles and Disorders for a comprehensive and quick list and easy to navigate.
This site has an extensive list of all types of sleep problems. Additions and deletions of articles will be maintained. Go to the bottom of the page and click and read the links you are interested.

English: Diagram illustrating the influence of dark-light rythms on circadian rythms and related physiology and behavior. (Photo credit: Wikipedia)
These Links about Sleep, Sleep Struggles & Disorders, ADD, Spectrum & Sleep, Circadian Rhythms, Chronic Fatigue Syndrome, Restless Leg Syndrome (RLS), Apnea, Insomnia, Narcolepsy, Rarer Sleep Disorders, Other elements impacting sleep, Light, vision, and sleep … and more.
Please leave comments as you explore these links. What is helpful and what is not? How do these sleep disorders apply to your life and situation?