I am an RN and I have a concern about my younger cousin. He woke up yesterday with a total lack of feeling in his left hand. He is able to hyperflex but not dorsiflex it, h e denies any pain has some numbness in the fingers, does not radiate past the wrist. He has suffered no trauma to his neck, back or hand. There is no swelling or bruising. He is 24, a smoker and he does take drugs at times. I'm going to check him out when I can but he denies any facial asymmetry, pupils are equal and no other part of his body is seemingly affected. After 2 days my red flag is up and I think he may need to go to the ER.