Our expert says:
It sounds as if you live a healthy lifestyle. The headache could be caused by a muscle spasm in the neck and upper back and this could make you nauseous if the pain is really bad. Other causes of nausea could be gastritis ( inflammation of the stomach lining), low bloodsugar, middle ear problems - but will then be associated with dizziness and migraine. Night sweats could be a sign of low bloodsugar or underlying infections like TB ( did you lose weight?).
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