Why do i get a headache every second day from my neck to the one side of my head from the morning to the next day?

Neck strain is one possible cause, and application of a heating pad may be effective. If other signs are present, including vision change, moderate pain, throbbing, please proceed to acute care. Stay well hydrated and update vaccinations.

As mentioned, the neck may be a trigger for the headache, but you might possess problems involving the scalene muscle focally, as an alternative cause. Seems you are in a escalating headache pattern, which does need attention, and urge neurological consultation to provide a diagnosis and appropriate therapy.

Posture and the attitude and placement of Head and Neck while sleeping could be contributing. A deliberate and unhurried visit to the PCP where one reviews every concern with him/her and gets a good Physical to check for muscle tensions and strains in the Head and Neck areas, in addition to the Full Comprehensive Physical/Lab and Imaging (if indicated) are done. Active investigation to resolve

The headache that you describe may be the result of impingement of the occipital nerve that exits the neck vertebrae on that side causing pain to radiate behind the ear onto to the head and to that side of your scalp. You may have a spur causing pinching of the nerve while asleep. An xray of your neck vertebrae may be revealing. Sleeping with a soft neck collar may help avoid the pinching