@reddy It might be allergies. I have asthma triggered by allergies, and my other post talks about my symptoms and issues. I think I have it figured out now. My issues all start with allergies that cause the build up of phlegm and can progress to being an infection. I have 3 cats and am very allergic to them. I found a way to cope with that with extra cleaning to remove dander, wiping my cats with a wet washcloth (they are not fans of that) a HEPA filter that also has carbon filtration next to my bed blowing on me, and wearing a good quality surgical mask when I sleep that is rated at 99% efficiency. We are more vulnerable when we sleep because we are not clearing phlegm like when we are up and moving around. You can try wearing a mask and see if it stops your phlegm buildup and then you would know where to start. My mask are made by 3M #1829 Procedure mask with >99% @ 0.1 Micron particles which is equivalent to a HEPA filter. they have ear loops and are comfortable to wear. I bought them online form Walmart. I also do allergy shots and/or antihistamines. Having chronic excess phlegm does set you up for lung infections because the bugs love it.

reddy @reddy, Welcome to Connect. Thank you for the greeting. I am not trained in anything medical, I only have my own experience to share with you. I am happy that you have already met @jenniferhunter who has shared her own experience, as well as some helpful suggestions that might give you some relief .
I also have been diagnosed with asthma that is triggered by seasonal allergies, warm weather and high humidity, and intense activity like fast walking or hiking. I try to avoid those trigger events as much as possible. My doctor has prscribed some allergy meds, that help during the allergy season.
One thing that I want to stress is to drink enough water to stay hydrated. This can help to loosen the phlegm.
If you are smoking, please quit because smoking has a big effect on our breathing. If it is discolored or if you are having breathing difficulties, I suggest that you check with a medical care provider. Is that something that you would be able to do? My decision to see a medical provider is when my symptoms interfere with my normal standard of daily living.

Keep in touch. I am intersted in hearing from you. I also am looking forward to what anyone else contributes to this conversation.