"So, for example, a C5 C6 disc that is herniated will affect the nerves that control the muscles in the shoulders, arms, hands, neck, as well as other areas of the body such as the head, eyes, ears, and thyroid gland.
Because of this, if there is any pressure applied to these nerves (whether it be from a herniated disc, or some other condition), it is very common that you will not only experience neck pain, but also symptoms related to these other areas.