What are symptoms of a cluster headache?
Cluster headaches generally reach their full force quickly -- within five or 10 minutes.
The pain is almost always one-sided, and it stays on the same side during a period, the time when you're getting daily attacks. (When a new headache period starts, it might switch to the opposite side, but that's rare.) It's often described as having a burning or piercing quality. It may be throbbing or constant.
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