Hi welcome to H.C.M.Forum. how did she neglect such a headache so long without diagnosis. one should not neglect solong. it could be due to tension, indigestion
, migrine, hypertension
what ever the reason may be pain manage ment is the 1st thing to be taken care of. 2nd thing anxiety to be taken care of. i advise you to consult a physian for diagnosis. you may have to undergo tests like CTScan , DC, ESR, etc for confermation. in such city head ache clinics also are there.
wishing her a quick recovery.