Allergy-induced.
Used to have that, pag minalas malas pa mornings ko, with matching sneezing super-loud, running nose.. ..and used to be on steroids, etc etc etc iin my teens
Then a BFF of my lola brought me to a faith healer in Laguna....
sometimes it is a bad case of sinusitis sabi nya,
or allergy to molds, or certain stuff in the air... coz, I was told to observe WHEN these headaches were common... and oo nga, in the mornings, and in certain times of the year... when molds are common, or maalikabok ang season.. (kaya haha.. alam ko kung my house is not super clean: either molds or alikabok yan)
1 lang ang advice: take cold showers as early as 5AM. Not to take a shower when the sun is already up, and kinda warm na the air, as in 8AM.
And definitely no cold showers in the morning. -- ngek, meant EVENINGS
Tiniis ko yan, and the headaches went away after 2 weeks. It is good I got off the steroids and meds too.
Ever since, basta headaches in the morning... I make tiis talaga to shower before 6AM -- COLD. I know it is hard, lalo na pag the season is cold, but well, better than meds and headaches through the days.
It works, wala nga masabi our family doctor and ENT specialist at Makati Med. Basta, it works.