Which characteristic is NOT true of cluster headaches?

Cluster headaches are characterized by highly distinctive features that differentiate them from other types of headaches. When considering the characteristics provided, the statement regarding daytime attacks is not true for cluster headaches.

Typically, cluster headaches occur in cycles and can wake patients from sleep, commonly being experienced at night or during the early morning hours, rather than during the daytime. This nocturnal characteristic aligns with the pattern of these headaches occurring in episodes or clusters, which can last for weeks to months, often with periods of remission in between.

The other aspects of cluster headaches, such as their short duration—often lasting from 15 minutes to 3 hours, the intense and sharp pain usually localized to the retro-orbital area, and their cyclical nature—where patients may have flare-ups that tend to occur during specific times of the year, particularly in the spring and fall, are all well established. These features collectively help in diagnosing and differentiating cluster headaches from other headache types, such as tension-type headaches or migraines.