When you don't sleep for a night then the next morning you won't feel very good.
Your body will feel very tires, your reaction times will be slow and you won't be able to concentrate properly during the day.
Your stomach may also feel hungry even though you have eaten and your muscles might also ache which is what happened to me when I stayed awake the whole night before.
Staying awake all night is certainly not a good thing because our bodies need the proper amount of sleep to heal itself and recharge out batteries.
When you don't get enough sleep you also increase your risk of developing cancer, diabetes, dementia and many other disease and conditions.
You're also at more of a risk of having a car accident or walking out into traffic when you're not fully rested due to a lack of sleep.
I have stayed up all night before but the next day I regretted it because I felt really awful and couldn't concentrate and enjoy the day.
If you cannot get sleep you may need to take sleeping pills or speak with your doctor about some prescription sleeping medicine which is stronger than over the counter sleep medicines.