My daughter is 16 and has headaches 3-4 times per week. We've had her tested for allergies, eyes tested, no real issues. The doctor doesn't seem to think there's a tumor, mentioned the possibility of a pituitary tumor, but not certain. She usually gets them mid day, and is trying not to use OTC drugs, and when she does they don't always work. She is able to function, but it is tiring.