Most of us feel unusually sleepy during office hours or even early in the evening once in a while. We blame it on lack of sleep the previous night, being physically exhausted, etc and really do not bother to find out the real excessive daytime sleepiness causes, thinking such a phase would soon be over; [...]

Hypersomnia is one of the sleep disorders that usually remain life-long, responding very poorly to treatment, when the condition is severe. When you know that it affects people mostly between 15 and 30, you cannot help but feel doubly saddened. Close to 5% of US population is affected by this disorder that strikes mostly teenagers [...]