A lip filler or lip augmentation is most commonly a procedure using a gel-like filler. There are a number of different type of filler that can be injected into your lips and around the mouth. Nowadays, lip filler injections are typically made up of hyaluronic acid that fills wrinkles, volumising soft tissue and hydrates the skin. Fillers are a safe and long-used substitute to restore the loss of volume, whilst also adding lift. They work by restoring volume and plumping your skin, so deep-set lines are smoothed. As we age, our bodies stop producing elastin and collagen, which contribute to a younger look.