Abstract: The present invention relates to urinary catheters, in particular indwelling urinary catheters, with self-sterilising capabilities. There is disclosed a catheter for insertion into the bladder of a patient, the catheter comprising an elongate body having a distal portion configured to reside in the patient's body, and a proximal portion configured to be left outside of the body of the patient. The catheter may further comprise at least one light generator provided within the distal portion of the elongate body so as to emit light, wherein said light comprises sterilising light.