There are so many reasons why you may experience neck pain. Some may complain about it when they strained their muscles from performing exercise activities, poor posture, sudden movements. Some associate it with infections of the throat or mouth since there are swollen lymph nodes located at the neck. But there can also be a time that when a patient complains of neck pain, cancer is the cause. How can one differentiate simple neck pain due to muscular issues from neck pain cancer causes?