When did people's phlegm start to become a problem? I have a light amount of phlegm for last 2 weeks but not really much of an issue. i can clear it out in morning and not have to deal for remainder of day. its yellowish and asked the doctor if that signaled infection and he said not necessarily. i've had 29 imrt treatments ( tommorrow is my last) to the tongue from 5 diff angles. really tryng to get at if this is just the beginning for me on the phlegm