When you have bleeding gums with bad breath, the main thing to do is to treat gingivitis. The main treatment is scaling, to remove the irritants around the teeth, so that the gingivitis is treated and the bad breath disappears. Bleeding gums are a typical manifestation of gum inflammation, and gingivitis is the most common type of periodontal disease. In patients with gingivitis there will be a large amount of irritants in the mouth, which will cause dysbiosis in the oral flora and will lead to bad breath. Once you have gingivitis with bad breath, it is important to get prompt treatment. Scaling is the best way to treat gingivitis. It is mainly done by ultrasonic shock to remove calculus and plaque around the teeth, then rinse with 3% hydrogen peroxide locally, then apply iodine glycerin or Paregoric ointment to the gums locally for anti-inflammation, and then rinse the mouth with mouthwash. Commonly used mouthwashes include chlorhexidine solution, rehabilitative new solution and tinidazole solution, etc. The use of mouthwash can consolidate the effect of scaling, maintain the flora environment in the mouth and keep the oral hygiene. This will allow the gingivitis to heal and not continue to develop, while the bad breath will slowly disappear with good maintenance at a later stage. For periodontal diseases, especially for patients who first have bleeding gums with bad breath, they must pay attention to it and go for periodontal treatment in time so as to benefit the oral health.