Staying up late can cause seven major harms to the body.

Injury 1: Deafness and tinnitus. Lack of sleep can easily cause insufficient blood supply to the inner ear and damage hearing. Staying up late for a long time may lead to deafness.

Injury 2: Obesity. People who stay up late often eat "late night snacks", which are not only difficult to digest, but also cause loss of appetite the next morning, resulting in nutritional imbalance and obesity.

Injury 3: Skin damage. The skin enters the state of maintenance at 10-11 pm. If you stay up late for a long time, the human endocrine and nervous systems will be imbalanced, making the skin dry, poor in elasticity, dull, and prone to problems such as acne, acne, and dark spots.

Injury 4: Memory loss. The sympathetic nerves of those who stay up late remain excited at night, and they will suffer from lack of energy, dizziness, memory loss, inattention, and slow reaction during the day. Over time, problems such as neurasthenia and insomnia may occur.

Injury five: gastrointestinal crisis. Human gastric mucosal epithelial cells are renewed every 2-3 days on average, and usually at night. If you eat at night, your gastrointestinal tract will not get a rest, which will affect its repair process. At the same time, late-night snacks remain in the stomach for a long time, which promotes the secretion of large amounts of gastric juice and causes irritation to the gastric mucosa. Over time, it can easily lead to gastric mucosal erosion and ulcers.

Injury 6: Decreased immunity. If you often stay up late, feel fatigued, and feel low in energy, your body's immunity will decrease accordingly, and colds, allergies, etc. will come to you unexpectedly.

Injury 7: Risk of heart disease. People who "confuse black and white" for a long time will not only have a bad temper, but their internal organs will not be adjusted in time, which will increase the chance of heart disease.