Hi I am an ardent squash player and I had an operation for a hernia three weeks ago and haven't been able to play since. While I was having the anesthetic for the operation the anesthetist could not put the needle in as she had trouble with the vein and it took several attempts until she was successful. I had a little play of squash today just simply knocking the ball about for a practice and I felt this strange pain in my arm where I had the anesthetic and my arm went red a bit and was painful and swelled a bit. It has gone down now but there is a lump on the vein and a bruise mark like a track mark along the upper inner part of my arm from the inner elbow to about bicep area and then it stops. It is tender and sore to touch and the lump is painful to touch. Can you let me know what it may be please