Adults are less susceptible to common colds then children, as you have a much better developed immune system, the symptoms and signs of a common cold are explained here.

If you are suffering from a server cough, and you smoke, the chances are you are developing a smoker’s cough:

mokers cough is frequently much worse in the morning before the chest has been cleared of mucus that has accumulated overnight.

Damage caused by smoking can be reversed by quitting smoking. If a long term smokers cough is becoming more intense or starts happening more frequently it may indicated the first signs of lung cancer – and requires immediate medical investigation.

Certain drugs taken by adults my also cause coughing – such as inhibitor drugs, for high blood pressure and heart disease.