A sleep disorder interferes with one's ability to sleep normally. For many people, it is a chronic, nightly problem that can affect daytime behavior. Activities at work and school and relations with loved ones can be affected. A sleep disorder can worsen existing medical conditions, and it can also lead to new medical problems.
Types of sleep disorders include:
Epworth Sleepiness Scale
Are you sleepy all the time? Use the Epworth Sleepiness Scale (ESS) to measure your daytime sleepiness.