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ESR is generally high in any inflammatory conditions like arthritis
, infection , in TB , auto immune diseases.In your situation I can best correlate this rise to your headaches
for any underlying disease.Headache can occur due to many factors like stress
, tension , migraine
, vessel disease , tumors , infection etc., I would like more information about your headache so that I can give you a better advice.I advise you to visit your Physician and get evaluated more on headache.