I Donated Plasma About 2 And A Half Hours Ago.

I donated plasma about 2 and a half hours ago. The nurses tell you that you can remove the bandage after two hours of donating. When I removed the bandage, I noticed a slight discomfort in my arm near the area that I was stuck and that there was a descent sized bump around the area. I’m assuming it’s harmless but I’m very stiff and sore already.