The headaches caused by tight neck and shoulder muscles are most accurately classified as:

A) Migraines
B) Cluster Headaches
C) Tension Headaches
D) Sinus Headaches

- Muscle Contraction: Tension headaches are primarily caused by the contraction or "tightening" of muscles in the neck and scalp area.
- Posture Link: Extended periods of sitting or poor posture (like "tech neck") cause these specific muscle groups to become overworked, leading to a dull, aching pain often described as a tight band around the head.
- Distinction: Unlike migraines (which are neurological and often involve light sensitivity) or sinus headaches (caused by inflammation/infection in sinus cavities), tension headaches are directly linked to physical strain in the upper body.