Migraine

Headaches are a type of terrible pain in the head and neck, and there are two main types.

The first are called primary headaches, and they’re more common. These are chronic or recurrent headaches, that account for over 90% of all headaches.

Some examples, are migraine headaches, tension headaches, and cluster headaches.

The second type are called secondary headaches, and these are acute headaches from a specific underlying cause like a serious head injury or a brain tumor.

So normally, throughout the body, there are special neurons that act as pain receptors.

These neurons convert a painful stimulus into an electrical signal that conveys the feeling of “pain” to the brain.

The brain itself does not have pain receptors, but nearby tissues in the head and neck like the blood vessels, meninges, and muscles do have pain receptors.

These pain receptors might be stimulated by a variety of things such as blood vessel spasm like in vasculitis, increased pressure like from a tumor, inflammation like in meningitis, or increased muscle tension like in temporomandibular disorder.

That helps explain the pain in secondary headaches.

Now, in primary headaches the exact mechanisms are unknown.

Tension headaches are the most common primary headache.

It’s called a tension headache because it feels like a band squeezing down on the head applying constant pressure or tension on it.

The pain is mild to moderate, can last a few hours, and usually there are no associated symptoms.

Tension headaches are usually triggered by stress, lack of sleep, and dehydration - imagine being late to work after a night of drinking heavily and not sleeping much.

Migraines are the second most common primary headache.