I only recall one day of bad migraines since I've ever used it. I added so much mn that of course I would but the reason I never diluted it was because it was messy & I feel like I'd have to wash my hair more often. I apply it straight but it's baby pea sized amounts in sections of my hair. I make four imaginary sections & rub a small amount around my scalp in that section. I get no ringing ears. But you just have to experiment since what may work for me may not work for you. I wish you luck if you do try this.