i'm sorry about your accident. i think you need to get this checked out by a medical professional. the coldness of your hand and arm could be a sign of poor blood circulation related to your accident. poor blood circulation can lead to tissue death and other complications. the only way to find out for sure if your injury is serious is to see a health care provider as soon as possible. particularly if your hand is grossly swollen a trip to an urgent care facility would probably be a good idea. take care!
i hit my right hand on a metal fixturea few days ago now im having a hard time opening and closing my hand. i am unable to grip items i have pain to the entire hand and my hand and arm is cold.