A. Primary headaches:
Common primary headaches include migraines, TACs (cluster headache, SUNCT, SUNA), and tension headaches.
According to the ICHD-3 classification system, there are different types of Migraine.
1. Migraine without Aura (formerly called Common Migraine).
2. Migraine with Aura (formerly called Classic or Complicated Migraine).
3. Migraine without Headache is characterized by visual problems or other aura symptoms, nausea, vomiting, and constipation, but without head pain. Technically, this is known as Typical Aura without Headache.
4. Migraine with Brainstem Aura (formerly called Basilar-Type Migraine)
5. Hemiplegic Migraine
6. Retinal Migraine
7. Chronic Migraine
8. Menstrual migraines
B. Secondary headaches:
Secondary headaches are symptoms that happen when another condition stimulates the pain-sensitive nerves of the head. In other words, the headache symptoms can be attributed to another cause.
alcohol-induced hangover, brain tumor, bleeding in or around the brain, "brain freeze," or ice-cream headaches, carbon monoxide poisoning, post traumatic/concussion, glaucoma, overuse of pain medication(rebound headache), headaches because of ophthalmological or ENT related problems etc..