Bleeding after brushing is a manifestation of gingivitis, cold water can be used to rinse the mouth, if the bleeding is serious, you can bleed by biting sterile gauze for pressure to stop the bleeding, can not stop the bleeding can be handled in the emergency department of dentistry. After the acute stage should be early periodontal examination and treatment, master the correct method of brushing, establish good oral hygiene habits, brush your teeth every morning and evening, use dental floss and mouthwash to assist in cleaning your teeth, clean your teeth every six months to a year, and have a dental examination.