What are the standards for natural design and effectiveness of forehead fillers?

Before the forehead filler consultation, I would like to know if the overall facial proportions, existing forehead curvature, and the distance between the brow bone and hairline are examined together, rather than just determining the desired volume first. I would also like to know if the profile and facial movements are assessed in addition to the frontal view. How much change is possible when aiming for a natural shape, and what criteria should I establish first to avoid an overly prominent appearance? Since the effectiveness and expected duration of forehead fillers vary depending on the product used and the current facial structure, I would like to hear about the scope and limitations during the consultation. Additionally, I would like to confirm the reasons for selecting the injection layer and product, guidance on what to do if swelling or bruising occurs, and the criteria for additional procedures, follow-up visits, or corrections. Finally, I would like to know if I can receive an explanation during the forehead filler consultation regarding vascular risk signals, emergency response methods, and items included in the cost.