Hi , three weeks ago i got a blood test , the person tied a band right above my elbow to make sure veins are visible. The blood test duration was about 1 to 1 min 30 seconds and my hand became cold due to the band as it stopped blood flow , once the band was removed temperature was back to normal. I did have pain and some numbness for 3-4 days but that reduced. Some very slight pain is still there but not constant. Currently i feel that sensitivity on the palmar side of the hand and fingers seems a bit lesser as compared to the right hand its not completely numb. Just reduced sensitivity. I have alot of anxiety aswell. I want to know if its possible that the band which was tied tightly could have caused any permanent damage to the arterys or nerves or muscles?