Pimple On Back Of Knee. In both cases excess fluid is produced causing inflammation in the fluid filled sac behind the knee. Straightening out your knee and flexing it can cause the pain to worsen.

The condition itself is a serious one and can lead. This knee pimple is the gift that keeps on popping and even scarier it pops high into the sky like a damn rocket. These growths are benign noncancerous.
Symptoms include a hard raised growth that is red pink.
In some cases likely this. Lotions or skin products. A cramp is a tightening of a muscle. A bakers cyst is a fluid-filled cyst that causes swelling of the knee.