This study tested whether symptoms of pain and edema associated with c
hange during the premenstrual phase of the monthly menstrual cycle exh
ibit a seasonal pattern. Menstruating chronic myofascial face pain cas
es (N = 99) and acquaintance controls (N = 100) were questioned about
their premenstrual symptoms during the prior month in each of 10 conse
cutive months. Unlike myofascial face pain and psychological distress,
premenstrual symptoms of general discomfort and edema did not show an
exacerbation in the dark months for either cases or controls. The pos
itive results for distress and facial pain and the negative results fo
r the premenstrual symptoms occurred whether or not respondents met an
algorithmic diagnosis of DSM-IV premenstrual dysphoric syndrome.