I've noticed that getting headaches and dizziness is quite common using minoxidil. I've been using it for a few days now and apply it once a day at night. I've noticed that as soon as I apply the minoxidil I get a headache immediately pulsing from the areas that I applied it. The headache doesnt really seem to go but fades throughtout the day until I apply the minoxidil again. Is this common or should it go away after a while because it is very irritating.