My husband and I both suffered from this symptom, he was blessed and had his last bout a week ago. As for me, now I have a secondary virus plus the phlegm. I give up on doctors. I eat an anti inflammatory diet, take fermented supplements when need, make my own quercetin, and am waiting for an order of mullein tea to arrive. So far............bupkis! Hang in everyone, we will make it through this. We now know what it is like to have a chronic illness.