Common causes are tension, migraine, eye strain, dehydration, low blood sugar, hypermastication and sinusitis. A large percentage of
headaches among women are caused by ever-fluctuating
estrogen during menstrual years. This can occur prior to, or even during midcycle menstruation. Treatment of an uncomplicated headache is usually symptomatic with over-the-counter painkillers. However, if it persists, it would be best to have this evaluated by your doctor.