hi its normal. some of us are just born that way not a lot you can but taken fresh garlic a couple of times a day will help break in down just chop it down fine mix in olive oil and take it that way just wash it down with water some just before bed is really good for you phlegm as it breaks it down and helps to clear it. chop a whole head of garlic in one go this way you have it ready its also very good for you blood if you a male good for erections as well. nothing like being healthy. good luck
can a cold make you have plghem. i keep coughing with huge glops of plghem coming up. i'm not a smoker.