Might want to visit a wellness focused chiropractor (not just a back cracker) to see if you have any pinched nerves in your neck or back. He/she should refer you to another practitioner if there is evidence of any other concern. Check in on your diet and any medications. If you are drinking or eating anything with aspartame or monosodium glutamate, discontinue immediately and make sure you are getting proper hydration. Also evaluate your caffiene intake. 4 weeks is a long time to have a headache, so I would suggest seeing some kind of health practitioner as soon a possible!
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