Conversation: The conversation between human and AI assistant.
[|Human|] I have been couging up a white chalky substance for the past two days.  The first time it was quite large and looked like popcorn with some brown mucus and a little blood.  Since the first one it has just been small rice size pieces I have coughed up but its been several times a day.  It started yesterday. shoudl I be concerned?
[|AI|]  Hello. Welcome to Chat Doctor. I am Chat Doctor. Yes this is hemoptysis, and it should not be neglected. There are many causes of it ranging from minor illness to malignancy.However, it is equally important to look into whole clinical picture. It would have been really helpful if you had provided your age, other symptoms along with cough, any such previous history or other chronic disease, any habits like smoking etc. Though this appears to be mostly due to bronchitis it needs confirmation by chest examination and radiological reports. You should visit the nearest chest physician for this and go accordingly. I hope this will help you. Wishing you healthy life ahead. Regards.