Whenever I get cold, I have blood coming along with a cough. I have this problem for the past one year. After drinking water and taking cough syrup, it becomes normal. I went to the doctor, and a chest X-ray was done. The result was normal. After a month, I had the same problem and went to the doctor. He suggested me to do an X-ray, sputum test and CT scan. I did all the tests, and the results came normal. Even today also, I had the same problem. I do not understand. Why do I have these symptoms when everything is normal? Please suggest.