Footnotes

• Competing interests: none declared

• A video recording of the patient during a headache attack is available on the journal website (www.jnnp.com). The recording shows the patient sitting still with a swollen eyelid on the right side. A few moments later she suddenly starts to cry intensely, while grabbing to her right eye and right ear. During this episode, she moves back and forth, and pronounced lacrymation is seen in her right eye.