Strange Causes of Headaches That Have Nothing to Do With Dehydration

29. Medication Side Effects (Not Overuse)

Sometimes, headaches aren't caused by overusing medication, but by taking certain prescribed drugs exactly as directed. Vasodilators (drugs that widen blood vessels, often used for heart conditions), some antidepressants, hormone therapies (like birth control pills), and even certain allergy medications can list headaches as a common side effect. If you started experiencing frequent headaches after beginning a new medication, check the information leaflet and discuss it with your doctor; an alternative might be available.

30. Neck Problems (Cervicogenic Headaches)

Pain that feels like a headache might actually be originating from issues in your neck. Cervicogenic headaches stem from problems with the bones, discs, or soft tissues in the cervical spine. This pain is "referred" to the head, often felt on one side, and can be triggered or worsened by specific neck movements or sustained postures. Unlike tension headaches caused by muscle tightness alone, these require addressing the underlying neck issue, often through physical therapy, specific exercises, or chiropractic care.