Hi, I am 17.The problem with my breathe is that whenever i cough,it's too hard that i can't stop coughing and when i stop i find my air way contracted.I have consulted a doc. He says that u havr bronchial asthma and have took my chest X-ray. He said me to never perform any exercise and never play any game. But on the other side,i feel him wrong cuz i've been playing football in a club for 4 years. Another thing i wanna tell u is that the sputum is of white colour and isn't so much.