<s>[INST] injured shoulder in the front sleepwalking, 21 year old female with and eating disorder so my arms are very thin. i woke up 3 days ago unable to lift my arm above my head when its bent, when my arm is straight out i cannot lift it to the side or up at all. There is no pain even when i lift my arm with the other, slight radiating pain down my left arm from the shoulder to my elbow is just recent. I can rotate the shoulder and grip things in my arms fine as long as they are below my breast level [/INST] Hello, I have studied your case and I think that you might be having cuff tear or a bony injury. I would recommend you to get ultrasound examination of the shoulder and also x-ray. If there is a fracture than you will need splinting of the shoulder. If it is a cuff tear than you might need arthroscopic surgery. It is a small incision surgery, and you can be discharge same day. I hope this answer will be useful for you. Let me know if there is any other followup questions. Thanks </s>