I cough up blood every other month its not alot and doesnt last but a few hours of streeking then its gone I wondwring why I feel ok and breathing fine no different than usual and is this hirting my lungs like damaging them its been happening for a long time now bout a year told doctors they said not to worry bout little bit of blood or ongoing streeks they just said to watch it but I want them to make it stop from happening it cant b good for my lungs and whatever is causing it cant b good so u think they would look into it they said I could come in for antibiotics but they said it should quit and not to worry unless its alot I want to stop it now before it gets to b alot or it makes something go wrong or worse anyone have this and what have u done they told me to take more vitamin k thats it so if anyone has reaccurring blood in mucus not alot just little more than streeks then goes away but comes back every month or two thank u for help