Make sure you get a PROPER diagnosis. I have had a fungal infection for a long time, and the Doctors kept giving me antibiotics for it, which made my problem worse. If he has a ongoing problem, search fungal infections- And research the things you should do after being on antibiotics, I just about bet that will be prescribed.
Hi,
How are you? This could be due to a post nasal-drip (PND) or nasal discharge or an infection. Normally, there are bacteria present in the mouth. With the close proximity of the throat and nasal passage, this may be a problem. The PND may fall on the microorganisms which would exacerbate the problem. If it persists, have this evaluated furtehr for proper management. Take care and best regards.