I found some blood in my sputum 5days ago on 19 October and from that day it continued. Actually i don't think that i have infection because i don't cough frequently(3 to 4 times per hour) and neither do i have fever but i have throat infection in past week on 12 October . I found blood mostly at morning and rest of day is normal sputum. When i try to cough there is pain between my left arm and neck close to sternum .
It just an infection or it pointing to major problem.plz anyone could help