Conversation: The conversation between human and AI assistant.
[|Human|] I have had a nagging cough for more than a week now.  Some days/times are worse than others.  At first the stuff that I was coughing up was thick and green/yellow but now clear and tastes like hydrogen peroxide.  I know that before it was a sinus infection.  Any clues as to what now?
[|AI|]  Thanks for your question on Chat Doctor. I can understand your concern. Greenish expectoration with coughing is commonly seen with bacterial lung infection like pneumonia. So we should first rule out pneumonia in your case. So consult pulmonologist and get done clinical examination of respiratory system and chest x-ray. You may need antibiotics to treat pneumonia. Don't worry, you will be alright with effective treatment. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.