People can develop neck and shoulder pain for a variety of reasons. In many cases, it may be a simple annoyance due to trauma or injury. Sometimes, it can indicate a serious condition, such as coronary artery disease.
People sometimes refer to cervical spondylosis as arthritis of the neck. As people age, the disks and joints in the neck degenerate. More than 85% of people aged 60 and above experience cervical spondylosis.
Source: Medical News Today