Patient: Description of condition (time of onset, main symptoms, hospital visited, etc.): Which department should be listed? Respiratory? Oral? Once hanging oral results were made to the dentist la, and now there are what methods of treatment more effective. Beijing Stomatological Hospital Oral Prevention Department Han Yongcheng: oral odor, which is often referred to as bad breath. You should first go to the stomatology department to check whether the oral periodontal is not clean, such as tartar, whether the gums are inflamed, etc.. And ask your doctor to do oral cleaning (commonly known as “scaling”). If you still have odor after local treatment, you should also go to a general hospital for blood tests to see if there are systemic diseases.