Conversation: The conversation between human and AI assistant.
[|Human|] Hello. My boyfriend got a Nissen surgery for 6 years ago and unfortunately, he got bad breath after that. . His doctor is  not really  aware about that and he is not looking that as a n issue. Hmy boyfriend is very good in his tooth cleaning and his dentist said that is not a mouth problemPlease, do you have any advise?
[|AI|]  Hi. Thanks for the query. As per your complaint bad breath also known as Halitosis can occur due to a number of causes like poor oral hygiene, oral and dental infections, post nasal Chat Doctor. . As he has undergone Nissan surgery that is for acid reflux then first I would like to know that are his symptoms relieved?Also, if he is on any medication? You should consult an Oral Physician or an Otolaryngologies and get evaluated and a thorough clinical evaluation and investigations depending upon suspected cause can help in diagnosis. Treatment of underlying cause will relieve the symptoms. As of now he should start gargling with a flavored mouthwash twice a day. You should chew flavored sugar free chewing gum. Do warm saline gargles twice a day. Limit the intake of high aroma foods like onion and garlic.