The body does not have any discomfort, work and rest and diet are also regular, but the sore throat occurs from time to time, what is this all about? New toothbrushes bought only 3-4 weeks after the use of Candida albicans, hemolytic streptococcus, pneumococcus and staphylococcus and other bacteria multiply, these bacteria every day through people brushing their teeth and directly invade the mucous membrane of the oral cavity, for a long time, the emergence of chronic pharyngitis, inflammation of the oral cavity and other diseases. Severe cases of rheumatic myocarditis and nephritis and other diseases. After 3 weeks, the toothbrush is a concentration camp of bacteria Toothbrushes are generally used for about 30 days will produce pollution, the number of bacteria up to one million, equal to the amount of bacteria in 9 cups of rag water, equivalent to the amount of bacteria in 29 one-dollar coins. Usually people do not pay attention to disinfection after use, in the humid environment often make bacteria multiply rapidly, but cause oral bacterial infection, extremely adverse to the human body. Few people will do a month to change a toothbrush, some people use low-quality toothbrushes for a long time, not only can not clear the oral bacteria, but carcinogens nitrosamines formed, causing serious oral, long-term stimulation of oral cells, triggering oral cancer. High season of influenza two toothbrushes alternately As the toothbrush is often in a moist state, pathogens are easy to breed and reproduce, it is recommended that the toothbrush can be placed outside the bathroom away from moisture, especially in the high incidence of influenza, ready to prepare two toothbrushes, alternating between morning and evening, can effectively prevent infections due to moisture in the toothbrush. In addition, due to the toothbrush contact teeth and every corner of the mouth, many germs hidden in the crevices, should be regularly cleaned and replaced, available disinfectant cabinet to disinfect the toothbrush, or toothbrush stored in hydrogen peroxide, it is recommended that the best every two months to replace the toothbrush, to avoid health threats to the human body.