See your dentist
You should see your dentist for evaluation.
Until then, in addition to what others have said, some people find that placing ice over the affected area sometimes will help with the pain. The web area between the thumb and index finger is supposed to be an acupressure point for controlling pain. Some people find applying pressure to the area helps relieve pain.
...Do you have a follow-up question? Consult Dr. Quon , a Oral and Maxillofacial Surgeon with 36 years in practice: