Impact of CT Scan on the veins

I recently had a CT scan and the IV was inserted into my hand.  The technician said that this is much more painful than an arm insertion because it "expands the veins" and there is less fat in the hand.  This was nerly a week ago and for two days after the test, I had very, very limited use of my whole forearm and now 6 days later continue to have protruding veins in my hand and up past my wrist as well as residual pain (especially when I let that arm fall to my side).  What causes this and is this a "normal" side effect?

[remar]

it could be the vein is inflamed. i had that happen to me one time. you should see your dr. i also kept a cold washcloth on my hand and that helped. take care. Remar