It can be restored, but it won't be the same as before, it will be a little thicker. This is caused by the stress response of the human body. After human tissue is injured, the wound will spontaneously thicken to resist the next injury. In the process of wound recovery, there will be a lot of cell tissue necrosis (which is also the reason why the lips are much thicker), and the human body will naturally absorb the necrotic cells, so your lips will slowly recover, and at most, a small piece of meat will grow in the inner cavity of the lips, which will not affect the appearance. When I was a child, I broke my lower lip and had a lot of stitches. Now I just have a small scar outside and a small piece of meat inside. It is estimated that it will take you several months to recover from the swelling.