What causes frequent migraines other than an aneurysm?
Migraines are a neurological disorder which usually cause repeated episodes of severe pain with many other symptoms. A Migraine has many stages however, and pain is only one of the stages. A Migraine attack can involve one or more of the stages, but does not necessarily even involve pain (acephalgic Migraine).
A brain aneurysm is a bulge in a blood vessel in the brain. This is often due to an congenital abnormality or weakness in a blood vessel (an abnormality present since birth). The head pain caused by an aneurysm is usually a one time event. The vessel bleeds - many times causing the "worst headache of your life"- and either you are able to catch it in time to repair it and stop the hemorrhaging, or you die.
People who end up having an aneurysm may or may not have a history of migraine. If a person does suffer from both, it is coincidence. There are no studies that state the two are related.
Very rarely, people who have migraines end up having a stroke. This is thought to be caused by extended ischemia (loss of blood flow) to an area of the brain due to migraines causing a change in the blood flow due to constriction and dilation of blood vessels. Strokes are not the same as aneurysms.
Migraines have many, many different triggers. Diet, sleep patterns, dehydration, weather changes, hormone changes, and stress are just a few of these triggers. In order to find out what is triggering your migraines, it is very helpful to begin keeping a migraine diary - so that you can look back and try to remember what happened in the 24 hours leading up to the attack. You may be able to identify a pattern and then prevent the trigger.
If you are having more than two migraines a month you should seek the care of a neurologist to try preventative migraine medications. It is trial and error to find the medication combination that works for you, however, it can reduce the frequency and duration of your migraines significantly.
--just to add to this, caffeine is actually a vasoconstrictor- it is a stimulant- and can compound problems by creating dependency and inducing migraines when caffeine is not consumed... it helps to soothe the pain of migraines presumably by decreasing pressure in the brain because there is a theory that migraine pain is caused by increased blood vessel size in the brain...waking up at the same time every day is indeed a great suggestion though- and drinking more water, getting adequate amounts of rest, eating a balanced diet, and regular exercise--keeping blood pressure in check can curb off headaches that could lead to migraines as well--and destressing on a regular basis...if you're having recurrent episodes of migraines you should keep a record of how often, how intense, and how long they last- and see a physician...