Divi-divi (Caesalpinia coriaria) has a history of traditional use in some regions of the Caribbean and Latin America, primarily as a folk remedy for a variety of ailments, including headaches. Traditional practices have involved using different parts of the plant (such as leaves or pods) in decoctions, poultices, or infusions for their purported analgesic properties. However, while these uses are documented in ethnobotanical surveys and local medicinal plant lists, they are largely based on anecdotal evidence and oral tradition rather than rigorous evaluation.

No substantial scientific studies have been conducted to validate the efficacy or safety of divi-divi specifically for tension headaches or any headache type. The plant is more widely recognized for its high tannin content and use in leather tanning and dyeing, rather than for pharmacological effects relevant to pain or headaches. Therefore, while its use in headache relief is rooted in tradition, there is little to no empirical evidence from controlled studies to support its effectiveness for this condition.

In summary, the use of divi-divi for treating tension headaches is justified by traditional practices, but the supporting evidence is weak and not scientifically validated.