Key Message
This case report describes a 38-year-old female scuba diver who experienced recurrent palmoplantar exfoliation due to pseudoephedrine-induced non-pigmented bullous fixed drug eruption. The diagnosis was confirmed based on her clinical history, results of an interferon-gamma ELISpot assay, and a graded drug challenge. The report underscores the importance of considering drug allergies as a cause of skin reactions in divers and suggests phenylephrine as a potential alternative for managing ear barotrauma in patients with pseudoephedrine hypersensitivity, highlighting the need for individualized care in drug allergy management.