About 2 weeks ago, I slipped on ice and landed on my elbow. It bruised really bad, but seemed perfectly fine. An hour ago, I leaned on a soft cushioned armchair and it tingled a bit and when I looked at it maybe 2 minutes later, a huge knot or lump was there. Its still there, just curious what it could be. It s exactly where I landed on my arm and there s still a tiny bit of bruising from when I fell.