After a fall from a ladder in the garage, my sister-in-law was hospitalized with a head injury. Since then she suffers from very bad breath, if her mouth is dry it is not so bad, (which is only in the morning as she has sleep apnea and wears madk so her mouth is open and drys out) but as soon as saliva hits, the bad breath is there, it is driving her crazy. the only thing she can take into her mouth that helps for a minute is milk. anything else aggravates the condition. Any suggestion would be most welcome. Carol