A 29-year-old chef presented to the dermatology clinic with a complaint of a sudden-onset, intensively itchy rash that he first noticed yesterday morning. The rash was not associated with any pain. Despite having felt unusually fatigued recently, he didn't have joint pain or any other systemic symptoms. His past medical history was unremarkable and he had no known allergies. He did not take any medications. His vitals were within normal limits, except for a slightly elevated temperature of 37.8 °C. His physical examination revealed a rash characterized by linear arrangements of erythematous papules and vesicles on his torso, lower abdomen, and lower extremities, as shown in the image. Notably, the chef mentioned that he had been experimenting with new recipes and had consumed a dish made with mushrooms two days before the onset of the rash.