Conversation: The conversation between human and AI assistant.
[|Human|] I am 50 years old and have been relatively healthy all my life, but over the past 18 months months since quitting smoking I wake up every morning with excessive saliva in my mouth (brownish color) and a very bitter taste that lasts all day. My wife tells me my breath is unpleasant even though I clean, floss, and gargle, several times a day. Could this be something serious ?.
[|AI|]  Hi, I read your problem. See, cause of brownish saliva I mouth is presence of nicotine in mouth. Usually smokers may find that their saliva remains brown, even if is they quit smoking, as their lungs rid themselves of cancer causing nicotine. Firstly, you should consult a doctor to rule out potentially dangerous disease. And unpleasant breath is due to sulfur produced by anaerobic bacteria. So, also visit your dentist for oral prophylaxis. Use antibacterial mouthwash also. Have a nice time. Take care