I quit smoking 10 days ago and still have a lot if phlegm and mucous, what can i do about it?

Mucolytic: Ask your friendly pharmacist for a mucolytic agent to help you clear this material. It takes time for the lining of the tubes leading into your lungs to recover from the damage done by cigarettes. Congratulations on stopping. Be patient. You will smell and taste things better, smell better to non-smokers and feel better over all. Good work. Be proud of yourself. Not easy to do.

Patience: The effects of smoking will not go away right away. Cough and phlegm may persist for months and even years. But, don't get disappointed as long term, you are better off not smoking!