Tight muscles at the base of your skull (the suboccipitals and upper trapezius) share nerve pathways with the head — when they're overworked from forward head posture, they can refer pain upward as a dull ache behind the eyes or at the temples. This is called a cervicogenic headache, and it's one of the most common headache types linked to desk work. Unlike migraines, it usually starts at the neck and radiates forward, and often eases with neck mobility work rather than rest alone. Gently mobilizing the upper neck and releasing tension in the trapezius can reduce frequency over time. If headaches are severe, sudden, or come with vision changes, see a doctor — this article isn't a diagnosis.