Yesterday ,Wednesday, Jim hooked me up. He has been one of the best techs we have. Arterial went in fine,good flow but he had trouble with the vieinus. He thought he had it but no. It started hurting and I told him this. WEll something happened ,vein moved and he had to dig around to get it.He finally found it and it flowed goot. Pressure was good BUT it hurt and continued hurting 3.5 hours.I only felt this pain one other time when I had to take potassium by IV.When he set me up,it hurt worse. It hurt while I held it and when he bandaged it. it was hurting so bad I could not fold my cover.This was around 9:30am and it is still hurting and swollen. I put an ice pack o it then moist heat but I cannot feel the buzzung in the vein ,only at the artery.I don't think the swelling is blood . Wonder what he could have done that caused this. It even hurts on the back of my armHe said he thought he hit a nerve. Could hitting a nerve cause this?