You are feeling pestered by nagging thoughts that are slowly draining your motivation and life force.
A tick is an insect that grabs on to flesh and sucks blood for its own sustenance. Blood is symbolic of passion and life force, and to lose even a little bit can represent the small ways in which annoying thoughts of negativity can slowly deplete your sense of well-being. To be infested with ticks is to recognize that the tipping point has come and your negativity is beginning to overwhelm you.... Complete Dictionary of Dreams