There is a difference between the botulinum toxin and dermal fillers. The former relaxes the muscles whereas the fillers fill and plump up lines, wrinkles and grooves to make the skin look more youthful. Fillers usually consist of sterile hyaluronic acid gels made from non-animal sources. As we age the skin's natural hyaluronic acid is lost giving rise to the appearance of lines, wrinkles and folds. Injecting fillers into the skin acts to replace the hyaluronic acid that is lost with age. They are also used for lip enhancement and for shaping facial, hand and neck contours.
The injections, which only take a few minutes, are usually administered after a local anaesthetic has been applied either directly onto the skin, or incorporated into the syringe containing the filler. This serves to reduce or prevent any discomfort. The effect of the treatment is visible immediately. Depending on the area treated, skin type and the injection technique, the filler effect can last between six and 12 months (usually six months for lips). Follow-up treatments will help to maintain the plumped up look over time.