There are people who find it difficult to sleep all night. This case could fall into the category of a sleep disorder called insomnia. In addition, there are people who fall asleep easily and then all of a sudden they would find themselves lying wide awake in the middle of the night.
The stage of waking up in the middle of the night is called ‘Middle Insomnia’ and it is quite normal, occurring among the people who live a very busy and a stressful life. However, if this action of waking up in the middle of the night prolongs for more nights within a week, it then becomes important to consult the medical expert. A research says that this short-term sleep problem affects only 30% of people and only once in a lifetime.