why am I tired all day but I am wide awake at night?

For me it's because night time is endless. Even if you wake up early, you have a certain amount of time before you have to start your scheduled day. There's so much to do: eat breakfast, shower, catch the bus to go to school, go to classes, eat lunch, catch the bus home, homework, work -whatever it is that we do. We live in a society where the day time doesn't really belong to us. But night time is kind of out own infinity. Maybe not literally - it does end. But there's something beautiful about the quiet. There's something about being able to stay up being lost in a book, talking to our best friend or a perfect stranger - there are no expectations about what we do with the night except that we prepare for another day. I personally don't like to give up a lot of that time for sleep if I don't have to. Night time is mine. Night time is endless and beautiful and the only place quiet enough for me to hear my own thoughts.

This is a common, but very interesting set of circumstances in which an individual is too tired to function but simultaneously too energetic to sleep. The most likely reason for this is a lot of mental exertion combined with little or no physical exertion. Your mind is exhausted but your muscles are eager. Physical activity should help you to sleep.

This is me everyday! For me I just generally like to stay up late at night and I usually can't sleep cause I'm nervous, or I have a problem I can't stop thinking about! And during the day I'm always tired from the lack of sleep I get cause I go to bed at 3-4 AM

Energy flows where attention goes. Probably you are enthusiastic about doing things at night, in solace, dark, minimum disturbance!

You are tired all the day but awake at night. This means your biological cycle has been disturbed. You are caught in a cycle in which the natural meaning of day and night has got altered. According to me, I would suggest you one day rest. Have sleep at night. You will be fresh the next morning

Insomnia I suppose. Don't worry, it's nothing to worry about, I'm like that too. Psychology says night owls are better people :) You should feel proud

Most likely, your circadian rhythm is out of balance - this can be caused from bad sleeping habits (e.g. going to be at 4am and waking up at noon) or sleeping disorders. Best to try and be active during the day, waking up at the same time every morning and going to bed at the same time every night to retain the natural rhythm in response to light. If the issue persists, best to go and see a doctor.

Even I feel sleepy whole day, but I'm wide awake when I go to bed. This is due to the biological imbalance in the body. Try exercising and drinking lots of water during the day. If you tire yourself out exercising, like running, it's much, much easier to fall asleep. The water helps your body keep everything in balance and working smoothly.

It sounds like you might have insomnia whether it's brought on by anxiety or unfortunately something you were born with. I suggest reaching out to a sleep doctor or a neurologist to discuss your tiredness and what could help you not just get to sleep but also feel awake during the day. Sleeping disorders are surprisingly common and there are many simple solutions to help!

When it's quiet, there is time to reflect on the past events of the day, be them good or bad, the more the thoughts went through my head the more awake I was. After a particularly bad day I would stay awake until the sun would come up, and probably well after to obsess over all the things I could have and should have done but didn't, all the things I wish I could have changed. So the lack of sleep for me was due to procrastination and over thinking.