Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns....
As per your complain bad smell in mouth seems to be due to a number of causes like Poor
oral hygiene, oral and
throat infection, upper respiratory infections,
sinusitis,
acid reflux,
diabetes etc..
Kissing does not seems to be apparent cause..
In case if the saliva stands for long over the lips bacterial action can lead to bad smell and you should clean your lips with water or wet tissue and do not expose it to saliva..
The other thing that I would like to tell you is that for bad smell you should maintain a good oral hygiene, gargle with flavoured antiseptic mouthwash, chew flavoured sugarfree chewing gum..
Drink plenty of water..
Limit the intake of high flavoured foods like onion and garlic..
In case of no improvement consult an Oral Physician and get evaluated..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora..