In this 5th and last part of the interview, Dr. Raspaldo explains how to prevent complications that could arise following an injection session. It is obviously essential to know well the anatomy and the arteries of the face, to know where to inject. It is also important to inject by small touch, and to pay attention to the discoloration of the skin (if it whitens, you must stop the injection). The follow-up of a patient is also essential in the coming days to check for any possible vascular complication. Finally, Dr. Raspaldo will share his experiences with us on complications experienced and solved, or on the contrary, on faces saved thanks to injections.