Migraine Nature Reviews Disease Primers Studies of Migraine's Many Triggers Offer Paths to New Therapies Headache After B12 Shot: 3 Effective Strategies to Feel Better Migraines are a big problem for many people. These severe, nearly disabling headaches can occur anywhere from once a year to three to four times a week. They can last from hours Did you know some medications can actually cause headaches and trigger migraine attacks? Learn which ones to watch out for to manage migraine and other health conditions effectively. in bio