When you feel uncomfortable and can’t say why, check your toothbrush hygiene. If your toothbrush is not of good quality, it will not only fail to clean your teeth but also damage them. Sometimes there is no general discomfort, but the sore throat is not cured for a long time. What is the reason for this? It turns out that it is caused by bacterial infection on the toothbrush. Under the microscope, toothbrushes used by patients with periodontal disease or oral mucosal inflammation are found to have a variety of disease-causing bacteria multiplying, such as Candida albicans, hemolytic cocci, staphylococcus, etc. Dental experts say that a toothbrush used for half a month to a month will produce contamination. People often can not afford to discard it, once the bacteria attached to the toothbrush in a humid environment with glycogen (sucrose on toothpaste) culture, will quickly multiply. If the gums are brushed and bacteria invade, people with poor immunity will be vulnerable to infection. For this reason, dental experts recommend: it is best to change a toothbrush every month; put the toothbrush outside the bathroom away from the humidity to reduce pollution; prepare two toothbrushes and use them alternately every morning and evening. Because toothbrushes are wet, bacteria are easy to multiply. Generally, toothbrushes can be dry after one day and night. Mouth and teeth is one of the main gateways for bacteria to invade the body, and toothbrushes and daily contact with teeth and many corners of the mouth, there will inevitably be a lot of germs hidden in the crevices of the toothbrush. And toothbrushes often more or less left behind toothpaste, oral food residues, bacteria will then enter the toothbrush. In addition, the toothbrush is placed in a more humid bathroom for a long time, and toothpaste contains a certain amount of sucrose, these also provide good conditions for the growth and reproduction of bacteria. Therefore, if the toothbrush is not frequently cleaned or regularly replaced, it will pose a certain threat to human health. Bacteria on toothbrushes can make a comeback in 3-4 weeks. American dental experts have tested people’s used toothbrushes and made bacterial cultures and found that many toothbrushes were contaminated with Candida albicans, Streptococcus hemolyticus, Pneumocystis pneumoniae and Staphylococcus. The new toothbrushes were found to be infected with these bacteria after only 3-4 weeks of use. These bacteria take advantage of the opportunity to brush teeth every day, through people directly swallowed or broken gum mucosa, oropharyngeal mucosa constantly invade the human body, thus causing gingivitis, chronic pharyngitis, stomatitis and enteritis, sepsis, septicemia, rheumatic myocarditis and nephritis and other diseases. Therefore, dental experts recommend that for oral inflammation, low immunity and organ transplant surgery, it is best to change a new toothbrush every month; cold and flu patients, after recovery should also be replaced with a new toothbrush to prevent its “comeback. To prevent the danger of bacteria on toothbrushes, people in general should also change their toothbrushes regularly. At least once a quarter, or once every other month if possible. It is also necessary to clean and disinfect the toothbrush frequently, such as soaking it in hydrogen peroxide for 4 to 5 hours, or soaking it in 0.1% to 0.5% peracetic acid disinfectant. However, it should be noted that the toothbrush should be thoroughly cleaned of the solution before use. Oral disease is an important public health problem that threatens the health of middle-aged and elderly people. Oral disease may cause or aggravate heart disease, stomach disease, diabetes, cardiovascular disease and joint disease and complications. Most people do not know much about oral health care, and only seek help from doctors when they are sick. In fact, if we pay more attention to oral hygiene in our daily life, many diseases can be avoided.