Like lifting threads, they induce the body’s natural collagen formation, but are much smaller in size (comparable to the size of a hair follicle) and come in various types. Common uses: treatment of acne scars, skin irregularities, and crepey skin. Other uses are for deep frown lines and radial lip lines, lip border and philtrum accentuation, tightening of skin under chin, neck lifting, and treating prominent nasolabial folds and marionette lines. Several treatments may be needed depending on the severity of the case. PDO threads stimulate collagen production while providing an immediately visible lift to the facial areas. Collagen induction occurs as with injectable dermal fillers, so results can been seen immediately and improve over time. Best result is seen within 3-6 months.