"For some reason, my head only hurts in the morning."
Translation:Mia kapo ial doloras al mi nur matene.
"For some reason" I keep forgetting to add that my head hurts <ME> (not somebody else).
Ah, I forgot that kialo is "reason" -- so if I wanted to say, for example, "I have a reason" it would not be mi havas ial as I was thinking, but rather mi havas kialon. And instead, the correlatives are "for some reason" (ial), "for no reason" (nenial), "for every reason" (ĉial).