Another difference between migraineheadaches and tension headaches is that, for the most part, migraine attacks happen only occasionally -- while tension headaches can occur as often as every day. Although fatigue and stress can bring on both tension and migraine headaches, migraines can be triggered by certain foods, changes in the body's hormone levels, and even changes in the weather.
(Click Migraine Triggers to learn about other things that may trigger symptoms of a migraine.)