This is a normal phenomenon after a fat graft. After any kind of surgery, the surgical area becomes hard due to scar tissues. With time, the scar tissues soften. If the scar protrudes after surgery, it becomes flatter. If the scar has pigmentation, the color fades. This applies to full-face fat injections. Once the fat is injected into the whole face, the whole face is a surgical area. Of course, the area where the fat is injected can become hard, which can cause discomfort when making natural facial expressions. For about three months after the fat graft, the fat will soften and facial expressions will become natural again.