At first I thought it was a pimple so I popped it,but now I am realizing it has to be more. When I popped it puss came out. So I decided to pop it again yesterday, the same thing happed. Now it is like a little hole in my left knee and purple colored skin surrounding it. I cannot put pressure on my left leg or stand for a long period of time, I cannot lay on the floor and spend time with my daughter. I need a way to fix this soon so can anyone please help.