Yes, Please. I Am Actually Calling For My Mother In

Yes, please. I am actually calling for my mother in law. She is 84 and for the last 1 1/2 years she hasn't been able to lift her head without pain. She has a neck brace that the doctor gave to her and has various tests done but at this point she isn't any better and noone seems to know what is going on. She walks with her head down and only holds it up if she is sitting in a chair with a back on it or if she puts her brace on. What could be the problem? She has a lot of pain in her neck area.