@scoop Great picture and description Scoop. Not necessarily hard but I would imagine if they sat in the lungs long enough they might become hard????
In December I brought up a mucus plug that was nearly one inch long and hope it represented my clearing the lower left lobe that the last C Scan indicated the area had worsened, plugging.
I believe that postural drainage, which I am fortunate to be able to do, along with my doing percussion on my lungs...front and back...helps tremendously.
Barbara