“…1 The cause of the disease is still unclear, and patients with this disease often have excessive smoking, prolonged sun exposure, ionizing radiation, harsh environment, and other related factors. 2 , 3 With the high incidence among fishermen, farmers, drivers, and the low incidence in women, the disease may be related to its occupational characteristics. 4 It usually occurs in the temporal, periorbital, neck, back of the hand and other exposure areas, with clinical manifestations of blackhead, cyst and elastic fiber nodules as the main features.…”