A device for therapeutic irradiation with light of a portion of a persons skin located on the posterior between the lumbus and the popliteal fossa during the use of a toilet, may comprise: a light source a controller electrically coupled to the light source, the controller being configured to control the intensity and duration of light emitted from the light source during a therapeutic session one or more sensors comprising a first sensor coupled to the controller for detecting a person seated on the toilet and a power source electrically coupled to the light source and the controller wherein the controller is further configured to turn on, and keep turned on for the duration of the therapeutic session, the light source when the first sensor detects the person seated on the toilet, and wherein the light source is configured to illuminate the portion of the persons skin.
