How often should you change your toothbrush?

It is recommended to replace the toothbrush once a month, and the longest time should not exceed three months.

Even after repeated washing with clean water, a small amount of food residue will remain on the surface of the toothbrush when brushing teeth, which is easy to be contaminated by bacteria, and the contamination may bring bacteria into the mouth. Moreover, if the toothbrush is used for too long, its bristles will be damaged and fall off to a certain extent, and there will be defects in brushing efficiency, cleanliness and angle, which may cause the teeth not to be brushed clean, cause to the occurrence of dental diseases. Therefore, the toothbrush should be kept dry at ordinary times. It is recommended to replace it once a month or so, and the longest time should not exceed three months, so as to avoid the growth of bacteria.