I can relate with your husband with the itching. I wonder though is it itching or tingling but anyway he should get it checked out with your doctor because I have Multiple Sclerosis and is caused by the Plaques built up on my brain stem. I do not mean to scare you. Anytime anything keeps you from sleeping and good rest is your body telling you something is wrong. Please go to the doctor and be sure to tell how long this has been going on and exactly how it feels and if anything triggers it. Such as holding your head in a certain position. These are things the Dr. needs to know. Good luck and let me know how you get along.