Staying up late will make people's hormone levels unbalanced, induce acne, and easily lead to dryness, wrinkles, acne and pigmentation.

The most tired organ that stays up late is the eyes, which will lead to black eyes, decreased vision and blurred vision.

When staying up late, it means that the human nerves are overloaded. The consequence of nervous system fatigue is passive slack, which makes the body inattentive, unresponsive and weak.