Lip fillers are suitable for all healthy adults unhappy with their lip volume and thinness, those with lip shape and symmetry irregularities, and those dissatisfied with their lip shape and lip and perioral lines. Lip fillers have actually been a common treatment method for many years, frequently used by plastic surgeons, particularly for facial deformities such as cleft lip, using techniques such as fat grafting or hyaluronic acid fillers. Now, with readily available, reliable hyaluronic acid-based lip fillers on the market, lip volume can be increased, and shape and symmetry irregularities corrected in an office/clinic setting. Lip fillers can be applied to healthy adults unhappy with their lip volume, thinness, and shape.