When people are old, they want to have good teeth and good health. Here is a method called "closing the door", which can achieve the purpose of health preservation through dental exercise.

Specific methods: close your lips, hold your breath and grind your teeth, keep your upper and lower teeth closed and loosen your teeth, and repeat this for dozens of times.

"Closing the door" can promote the metabolism of oral mucosa and blood circulation of gums, which is helpful to strengthen teeth; It can also prevent symptoms of transient cerebral ischemia and dizziness. Elderly patients with coronary heart disease, hypertension and diabetes insist on "closing the door" every day, which is of great benefit to physical fitness and disease prevention.

Insist on "closing the door" when defecating, which can promote excretion. "Closing Tianmen" also has the functions of improving digestion, relieving tension, strengthening brain and improving eyesight, and enhancing sexual function. Older friends might as well stick to it and have unexpected gains.