Hello doctor. Im a 23 year old male. I am wondering why am I always feeling tired. I do have trouble trying to sleep at night which results in sleeping at 3 to 4 AM in the morning. But some people out there sleep at this hour too yet still energetic after getting enough sleep. Im sleeping at this hour then wakes up around 11AM to 12 PM. That's around 6 to 7 hours of sleep and yet I feel so weak most of the times.