Under normal circumstances should be brushed first, and then use mouthwash rinse for a minute to spit out, which can effectively reduce the bacteria in the mouth and maintain oral hygiene, but mouthwash is not recommended for long-term use. Due to the presence of acute inflammation in the oral cavity or after tooth extraction, in order to prevent infection in the extraction socket and bacterial growth in the oral cavity, mouthwash can be used appropriately. It is recommended not to use it after 3-5 days, because mouthwash contains a moderate amount of a few antibiotics. Long-term use of mouthwash will lead to disorders of the oral flora to produce drug-resistant bacteria, so long-term use is not recommended. Patients can use mouthwash in appropriate amounts according to their own conditions.