Bath-Related Headache.

PURPOSE OF REVIEW: The purpose of this review is to summarize the most up-to-date literature on bath-related headache, a rare disorder.

RECENT FINDINGS: Initially described in middle-aged Asian women, it is now reported in a wider demographic. More information is available about the pathophysiology of bath-related headache, including its classification as a subtype of reversible cerebral vasoconstriction syndrome (RCVS). Nimodipine can be effective in patients both with and without vasospasm. Bath-related headache is a rare form of thunderclap headache. Although its mechanism is still unclear, it is associated with vasospasm and RCVS. Controlled trials investigating the use of nimodipine and other agents may be useful in furthering our understanding of and treatment of this phenomenon.