Pericoronitis
Pericoronitis is inflammation of the gum tissue surrounding the crown portion of a tooth. Pericoronitis usually affects the lower third molar (wisdom tooth) where gum tissue overlaps the chewing surface of the tooth. Pericoronitis can be either chronic or acute. Chronic pericoronitis is a mild persistent inflammation of the area. Acute pericoronitis is when the symptoms intensify to fever, swelling, and pain, which indicate a spreading infection.