Bleeding gums accompanied by bad breath generally have two main causes.
One is inflammation of the gums and periodontal disease caused by the bacterial influence of local inflammatory irritation. Local irritation includes the influence of external forces, plaque buildup, partial embedding of food, the influence of tartar, bad chemical-physical irritation such as smoking, or caused by pulpal necrosis due to irritation of bad restoration margins, etc., and bad breathing habits due to bad orthodontic appliances.
Second, systemic systemic and infectious diseases cause periodontal bleeding and necrosis. Systemic systemic diseases include endocrine disorders, cirrhosis, hypersplenism, hemophilia, leukemia, etc., as well as those caused by the use of anticoagulant drugs or other related drugs, which manifest in the oral cavity as gingivitis, bleeding gums, redness and swelling, and heavy breath.
Therefore, local irritants should be reduced, plaque should be controlled, oral hygiene should be maintained, and good resting habits should be maintained. If there are other worsening symptoms be sure to go to the oral and periodontal disease mucosal department of a regular hospital for further examination and then further solve the problem from the root cause.