Bad breath means that there are bacteria multiplying in the mouth, and the presence of bacteria in the mouth produces bad gases, so bad breath can occur. However, bad breath is not necessarily a disease of the mouth, it is also very likely to be a lung disease, through the breath brought to the bacteria in the mouth, it is also very likely to be a disease of the stomach brought to the mouth, but most of the time it is because of their own oral problems, such as chronic periodontitis or the patient has a smoking situation that leads to inflammation of the gums. Don’t ignore bad breath, it can be a sign of disease. If it is a chronic periodontitis, systematic periodontal treatment must be carried out in time. If it is caused by smoking, it is recommended to quit smoking as soon as possible, smoking is very harmful to the body. If it’s not an oral disease, it’s also important to rule out any other pathologies in the body.