Mouthwash generally includes medical mouthwash and home mouthwash. If suffering from gingivitis, periodontitis and other oral inflammatory diseases, or after oral surgery such as tooth extraction, doctors will generally prescribe medical mouthwash to treat or prevent infection. And normal people in the absence of oral disease, you can use home mouthwash to clean the mouth and improve breath as appropriate, but it is not recommended for frequent use. Doctors do not recommend the use of mouthwash may be because there is no longer a need to apply medical mouthwash, or intend to long-term application of mouthwash appears a series of diseases and is not suitable for application. 1, the use of medical mouthwash to achieve the purpose of treatment or prevention of infection, or mouth ulcers have healed, there is no continued use of medical mouthwash disease indications, usually, this time doctors will recommend to stop using mouthwash to avoid Which drugs continue to stimulate the healthy oral mucosa, but instead cause adverse effects; 2, home mouthwash generally has a certain bactericidal effect in addition to clean mouth and improve breath. Normal people in the absence of oral diseases, the oral cavity has its own microenvironment, if the frequent use of mouthwash with bactericidal effect may cause disruption of microbial levels in the oral cavity, resulting in the occurrence of other diseases of the oral mucosa, such as mucosal rupture or ulcers. Some mouthwashes may lead to tooth staining, long-term use of mouthwash may also produce inhibit saliva secretion, affect the sense of taste and other adverse consequences. The cleaning effect of mouthwash is limited and should not replace brushing. You can maintain oral hygiene and oral health by brushing your teeth in the morning and evening, rinsing your mouth after meals, using dental floss to clean the gaps between your teeth, and cleaning your teeth regularly.