He said he was painting handrail and went down on his left knee to get to the bottom of the handrail. He felt what he thought was a grain of sand poke him in the knee. He squeezed the bump that arose on 8/10/07. He said his knee then became swollen on 8/11/07. He sought medical attention on 8/12/07. On 8/14/07 he was sent for another medical visit.