Hi, filling the cheeks and chin is pretty standard, but for my own aesthetic, I use my patient's younger photos to make sure I am not turning them into a caricature of themselves, but instead honor their younger selves and make sure I am helping them to look like themselves and not a different person. Of course, it the person wants to look like a different person, that can be done, too, but I prefer to help my patients who have a good self image to maintain that "look" over the decades and not make decisions they will regret in only a few years. The forehead is an area which can be filled, but needs to be done with great caution. There is a procedure that we do in facial plastic surgery to reconstruct a person's nose after cancer surgery. This is called a paramedian forehead flap. The blood vessels which supply this flap runs along the medial part of the eyebrow running vertically upwards. I have recently witnessed injectors on Instagram injecting with a needle right along this area, and the only caveat is to "draw back" on the syringe prior to injecting. The problem with this technique is that the filler is very thick, and drawing back on fillers is different than drawing back with a saline solution like IV fluid, which nurses often do when placing an IV or drawing blood through an IV. I have a patient who visits me for nearly a decade from the New England area. I saw her recently and she had a scar on her forehead which she did not have from before. During the pandemic, she had her forehead indention injected by a facial plastic surgeon who specializes in Facial Feminization in her area and injected into the blood vessel. A vertical patch of skin lost its blood supply and scabbed up due to the loss of oxygen. This left her with a scar and the same pre-existing forehead indentation. The surgeon did not immediately inject hyaluronidase when this happened and gave her nitroglycerin paste to apply on the dying skin. Also told her to go get hyperbaric oxygen, but with no referral. When I see certain injections being shown on Instagram, it makes me very nervous, since many of the injectors are learning from each other on IG. It's like showing kids an stuntman performing a stunt on TV and you worry that children will try to copy them and end up hurting themselves or other people. Anyway, I hope this reply provided some value. Good luck. Best, Dr. Yang