A PDO thread is a type of cosmetic thread used in a minimally invasive procedure known as PDO thread lifting, which aims to improve skin texture and tighten sagging skin. Made from polydioxanone (PDO), these biocompatible threads are inserted into the skin to stimulate collagen production and provide a lifting effect. The threads dissolve naturally over time, while the collagen they promote helps maintain the skin's firmness and elasticity. This treatment is popular in aesthetic medicine for facial contouring and rejuvenation.