1. An irradiation device for insertion into an opening in the body for performing photodynamic therapy or diagnostics, comprising a housing configured to fully insert into and hold into the aforementioned hole, the housing accommodating an LED lighting system and a power source for supplying power to said LED lighting system, and the device installed in the hole works autonomously. 2. The device according to claim 1, in which the housing further comprises a flexible outer part, the shape of which during use can be changed to ensure a reliable fit to the walls of the hole. The device according to claim 2, in which the flexible outer part forms a continuous surface that tapers outwardly towards the rear of the device. The device according to claim 2 or 3, in which the flexible outer part is made of elastic material. A device according to any one of claims 1 to 3, in which the entire body is flexible. The device according to claim 1, wherein the housing further comprises a processing surface, wherein the LED system emits radiation from the processing surface. The device according to claim 6, in which the processing surface is made completely transparent to light with a wavelength corresponding to the radiation emitted by the LED lighting system. The device according to claim 6 or 7, in which the size and / or shape of the processing surface ensures that the hole is adjacent to the processing zone, so that in the process of using the device, the processing zone is irradiated with light from an LED lighting system. The device according to claim 6 or 7, in which the processing surface1. Устройство облучения для введения в отверстие в теле для выполнения фотодинамической терапии или диагностики, содержащее корпус, выполненный с возможностью полного введения в упомянутое отверстие и удержания в этом отверстии, при этом корпус вмещает светодиодную систему освещения и источник питания для подачи питания к указанной светодиодной системе освещения, причем установленное в отверс