in phlebotomy school i had a few morons blow up veins trying to do Syringe transfer venipuncture etc. a girl i dated shortly after she blew up my vein on topside of hand.
and when i had H1N1 (swine flu) and enterovirus(stomach flu) simultaneously, when i was admitted to urgent care my systolic bp was 200+. every time the nurse would stick a needle in, the blood would push the needle out and vein collapse, scary to watch i thought i was literally dying, lost like 30+ pounds and took many months to gain it back. this was 2014