The high incidence of oral diseases and incorrect dental care habits have a lot to do with each other. Now many teenagers like to commonly use mouthwash instead of toothpaste to clean the mouth, in fact, simply use mouthwash can only remove food debris floating on the surface of the teeth, and some in the hidden parts: such as food debris and deposits in the teeth are not easy to be removed, so never use mouthwash instead of brushing teeth. Some people think that the use of oral cleaning mouthwash can make the mouth clean, in fact, although mouthwash has antibacterial and sterilization function, but if you use mouthwash without brushing your teeth first, then the effect of mouthwash against tooth decay is very limited, and the bacteria remaining in the gap and gum sulcus or periodontal pockets will still multiply rapidly. Research proves that a bacteria can reproduce one generation every 3 hours. In addition, some mouthwashes contain drugs that are higher than those in toothpaste, and the use of mouthwashes may lead to oral flora imbalance, which can lead to oral diseases such as Candida infections. In addition, some mouthwashes can stain the teeth and tongue, and can even cause a reversible loss of taste. Therefore, adolescents suffering from periodontal disease should use therapeutic mouthwash in a targeted manner under the guidance of a dental professional. In addition, health care mouthwash is not recommended for long-term use, after each use of mouthwash to rinse the mouth again with water to avoid drug residues.