What causes numbness on the neck behind the right ear?
Organs of the body are attached to the spine and there are also
nerve endings to contend with. You could have slept wrong
(scrunched up on your pillow) tossed and turned all night without
realizing it. If you sleep wrong or even slightly injure yourself
at work or at home you could have injured a nerve or bruised the
nerve causing the lack of blood flow. This is usually not serious,
but if it continues for more than 3 weeks then you should see a
specialist about it.