If teeth and gums bleed during brushing, consider two aspects. The first aspect is that it is recommended to go to the hospital for routine blood tests, as there may be the presence of blood system diseases, such as leukemia. When there is a blood system disease, the bleeding gums are especially obvious, and need to be treated accordingly. Secondly, it is very likely that there is gingivitis and periodontitis. When there is gingivitis and periodontitis, the gum tissue is red, swollen and fragile, and it is easier to bleed. At the same time, there will be obvious bad breath, and there will be a lot of calculus and bacteria around the teeth, soft tartar. The main treatment is to clean the calculus around the teeth by scaling and rinsing with mouthwash to reduce the bacteria in the mouth. Once the calculus around the teeth is cleaned, the gums are restored to health and the bleeding symptoms disappear.