Conversation: The conversation between human and AI assistant.
[|Human|] i got sick last night and vomited up something dark and was anywhere between 4-6 inches long and round at the ends, right before this happened I had been coughing, before I could really tell what it actually was, it had disappeared when it was in the toliet. I dont think it was stool, scared me and still worried as to what it could have been. I still dont feel up to par.  Any ideas on what it might have been? Thanks for your time.
[|AI|]  Hello understand your concern. The first thing to define is can you explain more clearly you had a cough or a vomits? I mean if that black substance came out of the lungs or the stomach, because they have different plans of diagnosis and treatments too. If you say it was a vomiting you better to do a procedure fibrogastroscopy for the stomach and if it was a cough a fibrobronchoscopy for the lungs. If you are a heavy smoker or work in dirty environment it might be the lung problem but if you Chat Doctor. I will advise you to see a GP than to decide about the procedures I explain. Thank you