It's not even a headache so much as a stabbing pain around the back of my left eye. I am certain it's not a PHYSICAL issue because it only occurs ONE DAY a month, it doesn't affect vision at all, and the pain level varies depends upon light levels and such. And one-sided severe eyestrain would be awfully strange. (In context, I USED to have much better vision in my right eye than my left, but now I'm nearsighted to the same degree in both.)
I SUSPECT it's a mild, mild, mild migraine due to the eye-watering and nose-clogging side effects, plus the unilateral nature of the headache. And the monthly occurrence points towards a hormonal trigger.
(Also, if I can convince the nerves to stop being in pain for a short time, the sensation in that area is... weird. I don't know how to describe it. Like... it FEELS like I'm holding my left eye open wider than normal, even though, when I check it in the mirror or a quick selfie, my left eyelid is in fact slightly drooping.
This strange sensation is common to every instance of the monthly headache, and is in fact a precursor to the actual pain. I don't get it. If I have to physically pinpoint what's going on, I suppose it's that, when I raise my eyebrow with emphasis on the part to the side of the face, it's usually hooked up to the eyelid - you know, you raise your eyebrow and your eye gets wider? But on the left side, during these headaches, it's detached. If I want to widen the left eye, I have to use the muscles more towards the middle of the face. And, before you ask, the muscle that would ORDINARILY be involved in raising the eyelid when raising the eyebrow... is one of the ones that's hurting, yes. So it reeks of a neurological glitch fueled by a hormonal surge/drop rather than any intramuscular cause.
To articulate, I suppose THAT annoys me as badly as the actual pain, and doubly so when that area IS in pain. It just doesn't FEEL right, and it continues to monopolize some mental attention all through the duration of the irritating thing. Probably what tires me out, in the long-term...)
Anyway, I'm just complaining about it because it annoys me. Sympathies unneeded. Just trying to explain, in part, why I might be absent from my normal internet-addiction tonight. *grumbles and slouches off to do something productive while some mercifully small part of my neurology is malfunctioning on me*
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