Cluster headaches are defined by the symptoms:
Symptoms of cluster headaches:
- It strikes quickly, without warning
- Excruciating pain located around the
eyes
- Pain radiates to other areas - face, head, neck, and/or shoulders
- Pain is mostly on one side
I am restless when it hits
- My eyes tear; it's like I'm crying but the pain is so bad, maybe I am
- One eye gets all red
- My nose gets all stuffy or runs on the side of the pain
- I get sweaty
- My face gets pale
- My eyes/face swell on the same side as the pain
- My pupils get small
- My eyelid droops
- The pain is burning
- The pain is sharp
- The pain feels like a hot poker being stuck in my eye
- The pain feels like my eye is being pushed out of its socket
- I can't lay down during an attack.
- I hold my head and rock
- I feel nauseous
- I get very sensitive to light and sound
- I get them mainly in the spring and fall
- A headache can last anywhere from 15 minutes to a couple of hours
- The headaches mostly occur at night
- I will get several of them in one day
- I will get them daily for a while and then not for a while
http://www.mayoclinic.com/health/cluster-headache/DS00487/DSECTION=symptoms
The problem with defining something by symptoms... There could be several
very different causes for this type of pain.