Four days ago, I had surgery to remove four impacted wisdom teeth and one molar extraction. Yesterday, I began to develop swelling of the gums near the bottom right incision. Today it has grown up into a bubble covering the top of my back molar. One quarter of the molar is covered by the swollen gum. It is bubble shaped and deep red or white. Most of my pain has subsided but this localized area hurts severely and has gotten progressively worse. I have continued with salt water rinses and the medicated rinse the dentist gave me. All of the other sites seem to be healing just fine. Should I be concerned about infection? It feels like my molar is cutting into this piece of gum and it is a sharp burning pain that is radiating. No fever, is helped by pain medication but pain resumes immediately when the medication wears off.