The muscle in the back of my knee pops and hurts like crazy every time i swim breaststroke?

what does this mean? could it be bad?|||It means that you have a knee injury. Probably a medial crucial ligament. Not serious, but occasionally painful, you should probably see a physician and a pt.|||I used to have that a little bit, it would happen during breaststroke and drylands. Im not sure but after a while it just went away. Try some heating pads or blankets in case its a muscle issue, or consult your doctor or nurse over the phone. Dont you hate swim-related injuries?