HI
Welcome to Healthcare Magic Forum
You havent mentioned your age, sex, medical conditions , and presence of
fever or any other symptoms.
Green colored phlegm indicated presense of bacterial infection. So see a doctor and take the required medicines and also undergo investigations like a chest x-ray and a blood count, to rule out other possibilities.
A
chronic cough like yours can cause pain & palpatation. Even a cardiac illness like
pericarditis. So please see a doctor personally.
Meanwhile,
1. Drink warm water 3-4 glasses/day.
2. Avoid
Cold drinks/alcohol.
3. Avoid over exertion.