Thread lifting involves inserting dissolvable threads under the skin using a fine needle. The threads have small barbs or cones that help them adhere to the tissue and lift it. The threads also stimulate collagen production, which improves the firmness and elasticity of the skin. The procedure usually takes between 30 and 60 minutes, depending on the area and the number of threads used. The procedure is usually performed under local anesthesia or sedation, but sometimes general anesthesia may be used. The procedure may cause discomfort, such as a pulling or tight feeling, but most people tolerate it well.