A Diagram of Human Skin and Microneedles (IMAGE) DOE/Sandia National Laboratories Caption A study by Sandia National Laboratories and the University of New Mexico uses tiny microneedles that sip fluid in the middle layer of skin between the layer of dead skin cells and above where veins and nerves reside. Therefore, they're far less painful than traditional hypodermic needles. Credit Sandia National Laboratories Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.