(1)a black-tipped plug clogging a pore of the skin
(2)皮膚の毛穴をふさぐ先の黒い角栓
(3)an inflammatory disease involving the sebaceous glands of the skin; characterized by papules or pustules or comedones
(4)皮脂腺を含む炎症
(5)丘疹、膿庖、にきびを特徴とする