Hello and welcome to Healthcare Magic. Thanks for your query.
Headache can be due to numerous causes. Some of the common causes are tension headache
, cluster headache
or a manifestation of an underlying neurological or systemic problem.
In your case, a likely possibility for this bout of one-sided headache lasting for a few days is Migraine. However, other posibilities also need to be ruled out. Since this problem has not responded to the ususal pain killers, I would suggest that you see a doctor for a proper physical examination and further treatment.
Wish you all the best.
Dr. Jonas Sundarakumar