Abstract: The auto-illuminating syringe is configured for use with a syringe. The auto-illuminating syringe is configured for use in delivering an electrolytic media. Wherein the electrolytic media is delivered into a body through the syringe. The auto-illuminating syringe increases the contrast between the electrolytic media and the background such that the electrolytic media may be more readily seen when a dose is being drawn into the syringe. The auto-illuminating syringe comprises a plunger and an illumination circuit. The illumination circuit is contained within the plunger. The plunger is configured for use in pumping fluids out of the syringe. The illumination circuit generates a distinctive light that illuminates the electrolytic media in manner that allows the electrolytic media to be readily seen. The illumination circuit is activated by the presence of the electrolytic media.