Gum pain after filling is divided into two cases: recent gum pain and long-term gum pain: 1. Recent gum pain is usually due to the edge of the filling material is too long, or the shape of the protrusion is too large to form an overhang, causing pressure on the gum tissue causing gum pain, and there may also be because the filling is not polished enough after filling the tooth, and the edge has a sharp burr, this situation can also cause damage to the tooth and cause pain. If it is because the edge polishing is not enough, simple edge polishing can be solved, if it is because the shape protrusion is too large, the shape needs to be reshaped, if the edge is too long need to mechanically remove the overgrown edge, and then symptomatic gum soothing treatment, can also make the gum pain can be better solved; 2, the other in the late treatment of gum pain, often because the situation of the dental pulp changes have occurred, changes in the pulp lead to the appearance of periapical bone destruction, the destruction of periapical bone, penetrating the bone wall will cause swelling and pressure pain around the root tip of the gum.