Narcolepsy
Narcolepsy is excessive sleepiness in the daytime that results in falling asleep at inappropriate times and falling rapidly into REM sleep. Narcoleptics sleep a normal amount, it’s just that they can’t control when they sleep. Around 1 in every 2000 people have narcolepsy. The biggest issue of people suffering from narcolepsy is the inability to get properly diagnosed because first you have to rule out other sleep disorders. About 50% of narcoleptics are undiagnosed. And too