Having periodontitis does not heal on its own without treatment, and it is possible that periodontitis has progressed to the next stage. Periodontitis is a chronic infectious disease caused by chronic irritation of plaque formation, which is an inflammatory response. The earliest manifestation in the course of periodontitis development is foreign body irritation of the gums and congestion, redness and swelling of the gums, when early manifestations are dominated by bleeding from brushing. However, as time lengthens, the inflammation continues to the next stage, and the body’s immune system reacts against the inflammation with an immune defense, at which point periodontitis may be characterized by destructive damage as the main clinical manifestation, rather than bleeding from brushing. In destructive periodontal damage such as with receding gums, the patient may experience additional symptoms such as clogged teeth from eating and loose teeth that cannot be pushed. So once a patient bleeds before brushing and stops bleeding on its own after a while, it is not necessarily an improvement, but should be a progression of periodontitis to the next stage and an aggravation of the disease. Once the above situation occurs, the patient should go to a regular specialist hospital for consultation and treatment as soon as possible.