A flexible light therapy device, a bandage and a plaster for providing a therapeutic effect to a treatment target area 226 of a living being are provided. The flexible light therapy device comprises a light source 214 for emitting light 220, a light transmitting element 212 and a heat management means 210. The light transmitting element 212 is of a flexible light transmitting material and is optically coupled to the light source 214. The light transmitting element 212 comprises a light exit window 222 to emit the light 220 towards the treatment target area 226. The heat management means 210 is thermally coupled to the treatment target area 226 and distributes heat and controls the distribution of heat across the treatment target area 226. Part of the distributed heat may originate from the light source 214.本發明提供一種用於為一生物之一治療目標區域226提供一治療效果之可撓性之光療裝置、繃帶及石膏。該可撓性之光療裝置包括用於發射光220之一光源214、一光透射元件212及一熱管理構件210。光透射元件212係一可撓性之光透射材料且光學耦合至光源214。光透射元件212包括一光出射窗222以朝向治療目標區域226發射光220。熱管理構件210係熱耦合至治療目標區域226且分佈熱並控制跨越治療目標區域226之熱的分佈。經分佈熱之部分可源自光源214。