How can computer work cause neck pain and headaches?

Gravity is the biggest culprit at sedentary jobs that require a lot of computer work. Because the arms are rarely elevated, gravity gradually pulls down the shoulder blades, causing tension at the levator scapula muscle (one of the muscles that hold the shoulder in position). This will manifest as neck pain or headaches, and it could produce excessive stresses at the vertebrae themselves, resulting in structural diagnoses such as disk bulges, degenerated disks, and so on.

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