Transient acantholytic dermatosis (TAD, Grover disease) is a benign skin disease with nonspecific rash that may present as reddish-brown, dermatomal edematous papule or herpetiform partially central horny plug. This usually self-limiting and can subside within weeks months, but it also have chronic progression trend towards long-term recurrence. The patient an 80-year-old male who visited the c...