My leg has a swollen spot just beside my leftknee and it sticks out. no injury to it and just noticed in the last 24 he's. should i go to er. i'm wrd.

Cyst: A baker's cyst, also known as a popliteal cyst, is a benign swelling of the semimembranous or more rarely some other synovial bursa found behind the knee joint.

You have options: If you are very uncomfortable now and don't have a regular doctor you can see soon, or if your body can't fight infections well, you may wish to go to an er. If none of the above are true, consider a family doctor or dermatologist if they can see you within a few weeks. You can still go to the er if things change before your scheduled appointment.