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You are seeing a 30-year-old male in a primary care setting who has presented with a rash. The patient informs you that the rash started as a small group of blisters but then developed into a red, dry and scaly patch of skin which is very itchy. He also informs you that the rash is itchier at night and it burns throughout the day. On examination you note that the patient’s skin is quite dry and the lesions are oval-shaped. What is the most likely diagnosis?