Erosive pustular dermatosis of the scalp (EPDS) is a rare inflammatory disease with unknown etiology that usually occurs in the elderly. It is characterized by multiple sterile pustules, chronic crusted erosions, cicatricial alopecia, and skin atrophy. It typically develops in aged or sun-damaged skin and is most often accompanied by a history of local trauma. Histopathologically, non-specialized change manifests as atrophic epidermis and chronic inflammation. Although this disease mainly occurs in elderly white women, we here report a case of EPDS in a 35-year-old man, following hair transplantation as a local trauma, that was successfully treated with topical steroid.