Cluster headaches are an interesting clinical entity. They involve recurrent episodes of severe unilateral (one-sided) headache and facial pain, often more in the temple and around the eye. They can last 15-180 minutes, and generally start late in the day. They are also often associated with tearing or a read eye, puffy eyelid, a stuffy/runny nose, facial sweating, droopy eyelid, and a potential change in the size of the pupil - all on the same side as the headache. These occur in clusters, and can occur everyday, or a few times a day with a break.
Triggers include: alcohol, weather changes, and tobacco.
There are many prescription medications to help this. Oxygen can also be provided as this can help. Avoiding triggers is obviously important, as well.
Hope this helps. Take care.
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