Not many people are able to find the causes of their headache. The most common causes bright light and loud noise. Some perfumes and odors are also known to trigger a headache. Stress is also a cause of migraine.Among other causes is smoking, excess intake of alcohol, irregular sleeping pattern, skipping meals and tension. A fluctuation in hormones during the onset of menopause is also among the causes of migraine. These triggers do not always cause a headache and avoiding these does not prevent headache.