Hello, I can understand your concern. Did you the entire tooth removed after the tooth extraction was performed? Sometimes while extraction, the tooth breaks living the tip of the root inside the bone which may get infected and may cause pain later. It might also be the cause that the gap between the teeth is not closed as the remaining root might be interfering with the movement of the adjacent teeth to fill the gap. A dentist can diagnose such problem by taking an x-ray of the extraction site. If such root is present, its extraction under local anesthesia is advised. Alternatively, there might be one non-vital tooth present adjacent to the gap which may cause the pain. The pain might be felt in the gap as referred pain. Sometimes orthodontic treatment make the vital tooth nonvital by applying immense pressure on the tooth. In that case, tooth appears normal on the outside while carrying infection inside. A dentist can identify such tooth by performing electric pulp test. If such tooth is present, then its root canal treatment is necessary to eliminate the pain and save the tooth. I would recommend you to visit a dentist for physical examination of the painful area, x-ray of the extraction site and performing EPT (Electric Pulp Test) for the adjacent teeth to the extraction site. If you are in pain, you can take Acetaminophen 500 mg or Ibuprofen 400 mg or Ketorolac 10 mg up to three times a day. I hope this information helps you. Thank you for choosing HealthcareMagic. I wish you feel better soon. Best, Dr. Viraj Shah