People who fall asleep during the day can appear lethargic, unengaged, and often disinterested in various activities; however, in fact, up to 80% of people with these symptoms have a treatable medical problem such as Sleep Apnea, Insomnia, Narcolepsy or Periodic Limb Movements of Sleep (PLMS).

Here are some of the most common types of sleep disorders:

Sleep Apnea
Although, for many people, snoring has little medical consequences, for some people, snoring causes poor sleep. Snoring may be the first indication of OSA. People with OSA have frequent breathing stoppage at night, leading to an increased risk of high blood pressure, heart attack, stroke, and daytime sleepiness.

Insomnia
One in twelve people in the U.S. have chronic difficulty falling or staying asleep. Various treatments can improve sleep in about 85% of people with Insomnia.

Narcolepsy
Narcolepsy is treatable in most cases. Many people with Narcolepsy also suffer from uncontrollable sleepiness, vivid daytime dreams, "sleep paralysis," and a brief loss of muscle control.

Periodic Limb Movements of Sleep (PLMS)
Up to 10% of people in the U.S. may have repeated, uncontrollable leg twitching/jerking while they sleep. A medical treatment is usually effective.

Nightmares/Sleepwalking
Most can be diagnosed and treated medically.