FIGURE 1.

Pain scores for various pain conditions. All respondents were asked to rate their cluster headache pain using the Numerical Rating Scale (0–10, with 10 being the worst pain). Respondents were also asked if they had experienced any of a list of painful conditions; if they had, they were also asked to rate that pain. Numbers to the right indicate mean; error bars indicate standard deviation. The pain of cluster headache was individually compared to all other conditions, and in all cases was significantly more painful (*p < 0.0001)