Yes, there is no harm.

You can use relatively fine salt, rinse your mouth with salt soup and brush your teeth once in the morning and evening, which can prevent tooth decay and whiten it. The fluorine contained in table salt can reduce inflammation, sterilize and prevent tooth decay. For patients with liver fire and toothache, gargling with salt soup can have the effect of clearing away heat and reducing inflammation, and relieves the pain of toothache.

Extended information

Benefits of using salt water for brushing teeth:

1. Anti-inflammatory and dental treatment: The fluorine contained in table salt can reduce inflammation, sterilize and prevent tooth decay. . Therefore, rinsing your mouth with salt soup and brushing your teeth once in the morning and evening can prevent tooth decay. For patients suffering from liver fire and toothache, gargling the soup with table salt (green salt is better) can clear away heat and reduce inflammation and relieve the pain of toothache.

2. Clean stomach water: Drink 1 cup of light salt soup on an empty stomach in the morning. It can not only clear stomach fire, bad breath and bitter taste in the mouth, but also enhance digestive function, increase appetite, and cleanse the stomach. Internal heat in the intestines.

3. Prevention and treatment of hair loss: Gently apply the thick salt soup to the roots of the hair, and then wash it with water for about 5 minutes. Once a day in the morning and evening, a course of treatment lasts for 15 to 20 days. Prevent and treat hair loss.

4. Take care of the throat: The climate in autumn and winter is dry, which is a common period for acute and chronic pharyngitis and tonsillitis. In the early stages of the disease, salt soup can be used for treatment. The method is as follows: When you feel slight discomfort in your throat, you can use salt soup as a morning mouthwash. When the throat is swollen and painful, gargle with concentrated salt soup 5 to 6 times a day, which can have an anti-inflammatory and sterilizing effect.

5. Natural hemostasis: After nose bleeding, you can stuff cotton soaked in salt soup into your nostrils, and drink 1 cup of salt soup at the same time to stop bleeding. If minor bleeding occurs inside the mouth (such as gum bleeding, throat bleeding, fish bone stabbing and throat bleeding), gargling with salt soup can promote blood coagulation and stop bleeding naturally.

Reference: Baidu Encyclopedia-Effects of Salt