Why did I always have migraine after sleep during daylight?

I mean, each time when i wake up after sleep or taking a nap during daylight, which is afternoon or evening, I always wake up with massive headache. Migraine. I dont know why. I try to sleep in dark room. But in the end my head still hurts. Same if i sleep in the room with lamp switch on. Hmm. Im tired to figure it... show more I mean, each time when i wake up after sleep or taking a nap during daylight, which is afternoon or evening, I always wake up with massive headache. Migraine. I dont know why. I try to sleep in dark room. But in the end my head still hurts. Same if i sleep in the room with lamp switch on. Hmm. Im tired to figure it out. Seems like i havw to hold my eyes if i felt like sleeping in eveninf. :( do anyone know why???
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