Bleeding gums when you suck on them indicates gingivitis and periodontitis. Both diseases are due to poor long-term oral hygiene, with a lot of food debris, soft tartar, tartar and plaque accumulating on the tooth surface, between the teeth and in the periodontal pockets. On the one hand, these substances cause direct irritation to the gums, causing inflammation of the gums. On the other hand, they also release toxins that provoke the body’s immune response, leading to redness and bleeding of the mucous membrane in the gum area and the appearance of bad taste in the mouth. Patients with bleeding gums need to go to the hospital for systematic treatment, in addition to carefully brushing and rinsing their teeth on a daily basis. The treatment mainly includes ultrasonic scaling, or scaling, to remove food debris, soft tartar, tartar and plaque from the teeth and periodontal pockets, and for patients with deep periodontal pockets, further periodontal scaling treatment is required.