There are so many different types of migraine and headache that it is very easy to refer to them all as headaches or migraines. A continuous headache, or Cranium Continua, is often referred to as migraine. Although, in reality, it is not an actual migraine, many people with this disease also have migraines.
As an invisible illness, people can't see or know your pain. But you know your pain. If you have migraines, refer to them as such. If you are only having a headache, then a headache it is. If it is a migraine don't let others think you are having a simple headache, and thus treat you like someone having a normal headache.
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