I'm not a doctor, there is an enzyme, bromelain (from pineapple seeds) which may help.. kind of making the phlegm more fluid. But then, the phlegm could be a

I'm not a doctor, there is an enzyme, bromelain (from pineapple seeds) which may help.. kind of making the phlegm more fluid. But then, the phlegm could be a defense (mis)reaction to pollution or irritation by stuff you have accumulated in your sinuses - you may try to wash it (saline) and kill it (all bacteria whatever in layers, deep deep in, since years may be still there - kind of your suspended medical history).