IV Hydration is a quick and effective way to introduce fluids intravenously, or through your bloodstream. The fluid, given from a bag connected to a thin tube, called an IV, then inserted into one of your veins. These cocktails consist of water with electrolytes, sugar, medications or supplements, tailored to your specific needs and desired results. A nurse prep and disinfect the skin over the injection site, which is the lower part of the arm. Once the vein located, the nurse will then insert the IV Hydration. You may notice a little sting, however, that is just the feeling of soon to be, comfort!