Primary headaches are stand-alone illnesses caused directly by the over activity of, or problems with, structures in the head that are pain-sensitive.This includes the blood vessels, muscles, and nerves of the head and neck. They may also result from changes in chemical activity in the brain.
Common primary headaches include migraines, cluster headaches, and tension headaches.
Secondary headaches are symptoms that happen when another condition stimulates the pain-sensitive nerves of the head.
- Alcohol-induced hangover
- brain tumor
- blood clots
- bleeding in or around the brain
- “brain freeze,” or ice-cream headaches
- carbon monoxide poisoning
- teeth-grinding at night
- overuse of pain medication, known as rebound headaches.
- panic attacks