I have been to a doctor regarding a lump behind my knee, I was told it is probably a bakers cyst. It was not painful at the time. However, I jarred it since then and get a painful knee every now and the. It has been quite good for a few months, until 2 days ago, for no apparent reason it is very painful, I feels like a cramp that won t go away, it There are 2 lumps when press on my leg, on the inside just below the knee and on the outside of my leg just above my knee. It spasms then stops but pain is still there.