I have impacted wisdom teeth, and one of them got infected. what must be done?

See a dentist: You need to see a dentist who can evaluate your problem with a clinical examination and appropriate x-ray(s) where the entire tooth can be visualized. After diagnosing the problem, the dentist can either provide the optimal course of treatment for your problem or refer you to an oral and maxillofacial surgeon for treatment.

Oral surgeon: See the wisdom tooth expert - oral surgeon. For best results with wisdom teeth, make sure you are evaluated and treated by a board certified oral & maxillofacial surgeon.