Provided is a treatment method etc. for example against novel IL-8 related diseases, using an IL-8 signal inhibitor. Alternatively, provided is a treatment method etc. for example against known or novel IL-8 related diseases, using a novel anti-IL-8 antibody.本發明係提供對於新穎的IL-8相關疾病,使用IL-8訊息阻礙劑的治療方法等。或者,提供例如對於習知或新穎的IL-8相關疾病,使用新穎的抗IL-8抗體的治療方法等。