This dream may symbolize a hidden truth or secret that you have recently discovered or are in the process of uncovering. The worm popping out of your knee represents this hidden truth or secret, which may have been causing you discomfort or unease. The fact that it looked like a shoelace could suggest that this truth or secret is tied to your personal or emotional well-being. The gray color and yellow goo may represent feelings of confusion and disgust associated with this discovery. The worm being long and only showing the aglet at first could symbolize the gradual revelation of this truth. Squeezing the sides and having it fly out like pus from a zit could represent the release of pent-up emotions or the feeling of relief that comes with finally acknowledging the truth. The screaming worm could represent the fear or resistance you may have towards facing this truth. The second worm in the joint between your kneecap and femur could symbolize a deeper, more personal truth that you have yet to fully uncover. Overall, this dream may be urging you to confront and accept the hidden truths in your life in order to move forward and find peace.