I have been coughing for about 6 months now, every morning the cough are light yellow and bitter taste and durin a day cough change to white.

Chronic cough: A chronic cough like this could be related to allergies, reflux, asthma, emphysema. Regardless, it’s been going on way to long to be left unaddressed. You really should see a local doctor at this point for a directed history and physical examination along with relevant testing.

Please go to MD: You must be evaluated in person with an exam if you have been coughing for six months. Sorry, many things may cause a chronic cough Do you smoke cigarettes? fevers, ever cough up blood, feel tired, or losing weight are all very concerning signs x-rays and blood test maybe needed