Women’s bad breath according to different causes need to hang stomatology, otolaryngology, gastroenterology, respiratory, psychology and other different departments. 1. Stomatology: If bad breath is caused by periodontal infection, oral ulcers, periodontal abscesses, herpetic gingivitis, dental caries, dental irregularities, dental stumps, stumpy crowns, bad restorations and other diseases of orofacial origin, you need to hang up with the stomatology department. 2. Otorhinolaryngology: such as purulent tonsillitis, sinusitis, atrophic rhinitis, acute pharyngitis, nasopharyngeal abscess and other causes of halitosis need to hang up the otorhinolaryngology. 3. Gastroenterology: such as Helicobacter pylori infection, acute/chronic gastritis, peptic ulcer and other causes of bad breath, you need to consult the gastroenterology. 4. Respiratory medicine: If the bad breath is caused by bronchodilatation, chronic bronchitis, lung abscess, asthma, cystic fibrosis, etc., you need to hang up respiratory medicine. 5. Psychology: If it is delusional halitosis, also known as delusional halitosis or pseudohalitosis, such patients need to hang up the psychiatry department. It should be noted that oral disease is the main cause of bad breath, so if the patient does not know the cause of their own bad breath, you can prefer the stomatology department.