Is slight redness and swelling normal after MRI contrast dye injection?

did you have tape on the canula? as I'm allergic to medical tape and it gets swollen and red and very sore. but also, sometimes the canula itself can make your arm red and sore, you usually end up bruising as well which isn't anything to worry about too much. if it ends up being very warm/hot to the touch, swells a lot and so tender you can't move your arm or touch it then I'd start to be concerned but fingers crossed its all okay :)