because you are taking blood thinners it is very likely that you bled quite freely under the skin when that vein was compromised. blood is just fine when it is inside a vein but when it leaks outside the vein this "hematoma" can create quite a bit of inflammation - perhaps the reason for the local redness warmth and swelling. it is not possible for this blood leak to get back in your arm to cause a blood clot. if this area does not improve with ice compresses it would be good for you to consult your medical provider so you can be properly examined.
the nurse blew my vein when getting my inr checke. it hurts hot swelling n red. i take blood thinners should i be worried. it is in my right elbow. my lower and upper arm are starting to swell as well. i have the blood condition factor v linden. i take 7. 5mg of warfrain a day. should i be worried about my arm and getting a blood clot.