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What are warning signs of a cluster headache?

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Although the pain starts suddenly, you may catch a few subtle cues of the oncoming headache on the affected side:

  • Discomfort or a mild burning sensation
  • Swollen or drooping eye
  • Smaller pupil in the eye
  • Eye redness or watering
  • Runny or congested nose
  • Red, warm face You may begin to sweat a lot, or light may bother you.

From: Cluster Headaches WebMD Medical Reference

SOURCE: 

Mayo Clinic.

Reviewed by Jennifer Robinson on January 16, 2020

SOURCE: 

Mayo Clinic.

Reviewed by Jennifer Robinson on January 16, 2020

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How long does a cluster headache last?

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