I had my blood test done a few days ago which were unsuccessful because the nurse could not receive any blood. I have been previously known to have low iron, B12 and constantly dehydrated. I also suffer badly from fatigue but was quite surprised that this had happened. The nurse proceeded to try and find another vein but then reported back that as soon as the needle touched my vein it had 'deflated' so that I must come back in a few days. My main problem is that I am now experiencing a lot of pain in my arm, not so much bruising but more like sharp shooting pains in what it feels like are my veins, I was wondering if maybe the nurse had broken through a few veins while trying to find one? Has anyone else experienced this and is it normal? I am 18 years old and have been diagnosed with Crohn's disease for 6 years, usually my bloods are okay but I am slightly worried. Thank you.