With the improvement of living standards, people pay more and more attention to oral health, many people in order to have a mouthful of white teeth, keep fresh breath, began to use a variety of mouthwash. I do not know what kind of mouthwash, can not replace the role of toothbrush, and drug mouthwash should not be used every day. Now the domestic mouthwash is mainly divided into two categories, one is therapeutic, such as the application of mouthwash can prevent and control periodontal inflammation; periodontal disease patients in the periodontal professional treatment, mouthwash can be used to consolidate and maintain the efficacy; under the guidance of dental professionals to apply fluoride mouthwash to prevent dental caries in children and adolescents; dry mouth or head and neck cancer after radiation therapy damage to the salivary glands of patients, taking sedatives, especially tricyclic anxiolytics. Especially for those who have dry mouth caused by tricyclic anti-anxiety drugs, the use of anti-dry mouth rinse can relieve the symptoms. Another type of cosmetic or cleansing, that is, non-prescription, the main component of this type of mouthwash is oral freshener, can obtain temporary cosmetic effects, such as rinsing off the residual food residue in the mouth with mouthwash, temporarily remove oral odor, halitosis, etc., to maintain a fresh, soothing breath of the mouth, to enhance self-confidence in social activities. But ordinary people use pharmaceutical mouthwash not only no benefit, but also cause adverse consequences. Healthy people have a normal flora in the mouth, the use of pharmaceutical mouthwash will cause the normal flora in the mouth is out of balance, and may cause allergic reactions. Medicated mouthwash accidentally swallowed, will produce adverse stimulation of the stomach and intestines. Currently used more chlorhexidine mouthwash, will cause some staining of the teeth, tongue, oral mucosa, dental fillings, dentures, etc.. Chlorhexidine mouthwash tastes bitter and may also change the sense of taste and increase the deposition of tartar on the gums. General pregnancy and breastfeeding women and children under 18 years of age, adolescents should not use chlorhexidine mouthwash. Some mouthwashes have a high alcohol content, alcoholics in the abstinence of the volatile period, patients with dry mouth and children under 12 years of age are prohibited from using mouthwash containing alcohol, the use of mouthwash containing alcohol, usually have a burning sensation in the mouth. In fact, the general public in ordinary life gargle using water or salt water can be. When gargling, the water in the mouth, drum two cheeks and lips, so that the water in the mouth can fully contact with the teeth, gums, and the use of water power repeatedly rinse all parts of the mouth, as far as possible to remove the food residues and soft scales that remain in the teeth of the small niche small furrow, gap, gums, lip and cheek groove, so that the number of bacteria in the mouth relatively reduced, so as to achieve the purpose of cleaning the mouth. Some people simply give up brushing their teeth and rinse their mouth with mouthwash in order to save time, which is incorrect. Gargling can certainly remove the food residue and some of the soft dirt in the mouth, but it is far from brushing thoroughly. One of the main purposes of brushing is to remove the plaque attached to the surface of the teeth. In this process, the most important role is played by the physical friction of the toothbrush, and mouthwash is unable to perform this friction and therefore cannot remove plaque. Despite some advertisements, today’s second-generation mouthwashes contain ingredients that inhibit plaque formation and can work for a long time in the mouth. But people keep secreting saliva, and the plaque inhibiting ingredients in mouthwash are constantly being diluted, so mouthwash can never replace toothbrushing. Therefore, experts caution that pharmaceutical mouthwash should be used sparingly if nothing else.