Fragrance is the most common cosmetic allergen found when dermatitis patients are patch tested in the United States and in many places worldwide. Fragrances are ubiquitous in our daily lives and are present in items ranging from toiletries to toilet tissue. Although fragrances enhance the smell or mask unpleasant odors of various cosmetics and household items, it becomes very difficult for fragrance-allergic patients to find products they can use. Many items labeled unscented and fragrance-free contain esoteric fragrance chemicals that most consumers would not recognize. This article details some covert fragrance agents to help physicians better educate their fragrance-sensitive patients.