Pericoronitis is inflammation of the gum tissue around a partially erupted wisdom tooth. Learn about the risk factors, diagnosis, home remedies and complications of this condition. Pericoronitis is an intraoral inflammatory process caused by infection of the gingival tissue surrounding or overlying an erupting or partially erupted tooth . It is most commonly associated with the eruption of mandibular third molars, but it can be seen with any erupting teeth. Pericoronitis is inflammation of the tissue around a wisdom tooth, often caused by bacteria. Learn about the symptoms, risk factors, diagnosis, complications, and treatment options for this condition. Pericoronitis is a gum infection around a partially erupted tooth, usually affecting the lower wisdom teeth. Learn how to recognize the signs, causes, and treatments of pericoronitis , and how to prevent it with good oral hygiene and quitting smoking.