<s>[INST] Hello doctor, I spit blood early in the morning after waking up. I consulted a dentist and then a chest specialist, who advised bronchoscopy and sputum tests. The reports were normal. But, nobody could find the cause for the blood in spit. It is happening from the past two years. Not regularly, but once or twice a week. What might be the reason? Whom should I consult? [/INST] Hello. Get these investigations done and write back to me with the reports. For more information consult a general medicine physician online --> </s>