Generally going to bed at 12 o’clock counts as staying up late. Generally speaking, it is recommended that you should not go to bed after 11:00 at the latest, and you should count staying up late after 11:00 pm. There are many hazards of staying up late, which may lead to endocrine disorders, cardiovascular and cerebrovascular diseases, digestive disorders, etc., insomnia, dreaminess, anxiety, hair loss, rough skin, acne, indigestion, etc., especially for children, and may even affect growth and development. Long-term will also lead to lead to the body multi-system dysfunction, affecting normal work and study. Affect the mental state. You should adjust your biological clock and avoid staying up late. Adopt the habit of going to bed early and getting up early.