I am a 28 year old guy, suffering from cough. Its been more than 3 months, but my dry cough is not improving. I consult so many doctors and tried every medicine, but still, nothing happened. I have done X-rays of my chest, blood test, but still everything is normal. Don't know, whats going on. Doctors says that its allergic, but how long. Its been since more than 4 months, I am suffering from dry cough. Give me some solution of it.