Coffee has always been the main cause of making people awake at night. Some people, however, instead of being awake, feel sleepy and tired and, as a result, experience a caffeine crash rather than a caffeine rush. The following are the main causes of coffee exhaustion:
1. Caffeine Can Affect Stress
The major leading cause of stress is the stress hormone cortisol increase. An elevated cortisol level makes a person feel anxious and stressed. Though those two particular feelings may seem to you to be the source of awakening, they can indeed lead to tiredness and fatigue later on the day.