In this scenario, pus may spontaneously discharge via an intra-oral sinus located over the mandibular second or first molar, or even the second premolar. Similar causes of pain, some which can occur in conjunction with pericoronitis may include:

Dental caries (tooth decay) of the wisdom tooth and of the distal surface of the second molar is common. Tooth decay may cause pulpitis (toothache) to occur in the same region, and this may cause pulp necrosis and the formation of a periapical abscess associated with either tooth. Food can also become stuck between the wisdom tooth and the tooth in front, termed food packing, and cause acute inflammation in a periodontal pocket when the bacteria become trapped. A periodontal abscess may even form by this mechanism. Pain associated with temporomandibular joint disorder and myofascial pain also often occurs in the same region as pericoronitis. J are easily missed diagnoses in the presence of mild and chronic pericoronitis, and the latter may not be contributing greatly to the individuals pain (see table).It is rare for pericoronitis to occur in association with both lower third molars at the same time, despite the fact that many young people will have both lower wisdom teeth partially erupted. Therefore, bilateral pain from the lower third molar region is unlikely to be caused by pericoronitis and more likely to be muscular in origin. Prevention
Prevention of pericoronitis can be achieved by removing impacted third molars before they erupt into the mouth, or through preemptive operculectomy.
A lack of hydrochloric acid produced by the stomach is one of the most common age-related causes of a harmed digestive system.Among men and women, 27% experience a varying degree of achlorhydria. US researchers found that over 30% of women and men over the age of 60 have little to no acid secretion in the stomach. Additionally, 40% of postmenopausal women have shown to have no basal gastric acid secretion in the stomach, with 39.8% occurring in females 80 to 89 years old Autoimmune Disorders
Autoimmune disorders are also linked to advancing age, specifically autoimmune gastritis, which is when the body produces unwelcomed antibodies and causes inflammation of the stomach. Autoimmune disorders are also a cause for small bacterial growth in the bowel and a deficiency of Vitamin B-12. These have also proved to be factors of acid secretion in the stomach.Hypothyroidism: Thyroid hormones are a factor in the decreasing of hydrochloric acid in the stomach, thus hypothyroidism is associated with a greater risk of developing achlorhydria.Autoimmune conditions are often managed using various treatments; however, these treatments have no known effect on achlorhydria. Other
Other risk factors include, over the counter acid-blocking medications and antibiotics that may be used to block stomach acid. These medications are often taken by individuals for a longer than recommended period, even for years, despite causing adverse effects on stomach acid secretion.Stress has also been proven to be linked to symptoms associated with achlorhydria including constant belching, constipation, and abdominal pain.