At The Clinic Holland Park, we have the benefit of cutting-edge technology for improved safety: our V scan can pinpoint the position of blood vessels so that your aesthetician can carry out your filler treatment with ultimate precision. Nonetheless, as with any procedure involving an injection through the skin, there is a small risk of infection, but this is minimised by our practitioners using aseptic techniques to protect against contamination. There may be mild bleeding, bruising or swelling at the injection site, which will self-resolve. There have been rare but serious side effects associated with dermal fillers including blindness and intracranial complications. That is why we believe that these treatments should only be performed by medical professionals who have undergone post-graduate training and who are practised and skilled in such procedures.