Over 2months ago a tech blew my vein doing a iv contrast. it is still having pain/tenderness in the injection site including numbness in pinky why!?!?

Scar: For lack of a better word. Depending on where the catheter was will help explain some symptoms. If at the elbow, the contrast and blood forms a pocket. If there is a nerve nearby, there may be some pressure on it . Depends on how much was injected as well. Small amount should resorb quickly while larger amounts a little longer. You should talk to your doctor about possible relief.