I have a problem with my respiratory system. I don't know if my lungs or airway have bleeding. I got this when I was 10 years old, and now I'm 23. Every time I'm stressed, blood comes out, or if I work out hard, and I'm out of condition, blood comes out, too, very red. I thought at first it was phlegm, but when I spit it out,it was blood. Please help me. I don't know the cure for this disease.