I get migraines. The lay in total darkness with zero sound for a day, puke bucket kind of migraines.

When my right lower eyelid starts to twitch from stress, too much computer screen time or whatever I know that within 24 hours I will get a migraine. The twitch is a great tip-off and if I can take my meds early enough, I'll only get a regular headache at most.
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“If the military were fighting for our freedom, they would be storming Capitol Hill”. – FleaFlickr02