There's something called "sleep apnoea," which involves many interruptions in a person's breathing during the night, making you wake up briefly each time. Usually, the sufferer isn't aware that their sleep is continually being disrupted, but a direct effect of it is constant tiredness.
http://en.wikipedia.org/wiki/Sleep_apnea
Then, there's narcolepsy. Excessive daytime sleepiness is a defining feature of narcolepsy.
http://en.wikipedia.org/wiki/Narcolepsy
Another thing that could be affecting you is your diet! I've been on a hypoglycemic diet for a few months now and it has helped me with my sleeping problems (well, I've not been sticking to it as of late the effects show.) With hypoglycemia, your sugar levels are going crazy, causing you to feel very tired. Go here for more info: http://ehealthforum.com/health/topic119108.html
It might be worth it to go and have a sleep study done to see if it's any of the first two or something else. Hope you figure it out. Sleep problems can really mess you up.
Is it normal that I always feel exhausted?
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It could be many things.
There's something called "sleep apnoea," which involves many interruptions in a person's breathing during the night, making you wake up briefly each time. Usually, the sufferer isn't aware that their sleep is continually being disrupted, but a direct effect of it is constant tiredness.
http://en.wikipedia.org/wiki/Sleep_apnea
Then, there's narcolepsy. Excessive daytime sleepiness is a defining feature of narcolepsy.
http://en.wikipedia.org/wiki/Narcolepsy
Another thing that could be affecting you is your diet! I've been on a hypoglycemic diet for a few months now and it has helped me with my sleeping problems (well, I've not been sticking to it as of late the effects show.) With hypoglycemia, your sugar levels are going crazy, causing you to feel very tired. Go here for more info: http://ehealthforum.com/health/topic119108.html
It might be worth it to go and have a sleep study done to see if it's any of the first two or something else. Hope you figure it out. Sleep problems can really mess you up.