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There have been several factors that have been pointed out as causes of obsessions. Some of these are stress, brain dysfunctions, brain chemicals, and habitual behavior. The following set of sections are probable points on what causes obsessions. slide 2 of 7. Stress has been considered as a factor in obsession and OCD. Stress can make a person vulnerable to fear, anxiety, and obsession.
One leading theory for the cause of migraines is âcortical spreading depression.â This wave of brain activity that sweeps over the brain, can be seen on an MRI and is blamed for migraine aura and other migraine symptoms. Others believe hyperactivity in the brain stem causes migraines. Because migraines are difficult to control, many people with this disorder often take medication regularly. Overuse of medication can also lead to migraines.