Hello My Name IsBridget. I Went To The Hospital November

Hello my name isBridget. I went to the hospital November 1st of last year for a Crohn's flare. The nurses always have a hard time getting an IV in me. They usually have to stick me multiple times to get IV started. Which they did and several times for blood draws. I was discharged November 7th. My arm was bruised pretty bad from all the sticks. It's now 2 months later and it's still looks very bruised up, painful, and now there is a big knot on my arm. What should I do?