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This article discusses a case of occupational contact dermatitis in a 44-year-old man who developed a recurrent facial rash after exposure to pyrethrum daisies (Tanacetum cinerariifolium) at his workplace. The man experienced symptoms for 2-4 weeks each summer, which improved but did not completely resolve after 2 months. Patch testing revealed positive reactions to the crop, as well as other substances. The patient was prescribed medication and provided with protective equipment to wear during exposure. The article emphasizes the importance of patch testing for specific allergens to which a patient may be exposed, rather than relying solely on commonly tested allergens. [Extracted from the article]