Why do people sometimes feel worse (physically) when they quit smoking? -
Because the body is craving nicotine, you can also suffer from a cough etc because your lungs start to clear out the build up of tar.
nicotine withdrawls
The body is accustomed to the nicotine ,so it takes some time to re-adjust . In time , the person will feel much better than he did when he smoked .
Your body is addicted to the drugs and it is gong through withdrawal. There are a variety of things that you can do to lesson the effect. Contact your local health care professionals for advice.