The invention relates to alight emitting device (1) for application near mammal tissue (2), e.g. for the relief of pain, comprising: a flexible body (3) having a front surface (4) for facing the mammal tissue and an opposing back surface (5), said flexible body accommodating at least one light source (6), said at least one light source (6) is arranged for irradiating an irradiation area of said mammal tissue (2). A thermally insulating layer (7) covers the back surface (5) of the flexible body (3). The thermally insulating layer (7) has a larger surface area than the flexible body (3). The invention further relates to a kit of parts for such a light emitting device and to a method for assembling such a light emitting device.
