Inflammation of tooth root with abscess untreated can lead to loose tooth, necrosis of tooth, ulcers, tumors and so on. Inflammation of tooth root with abscess may be due to the fistula caused by apical inflammation, if not treated in time the abscess will not subside on its own, but will continue to grow, damaging the root of the tooth, making the tooth loose, necrosis and other symptoms, leading to interstitial infection. If the abscess breaks down on its own, pus will flow out, and the abscess may then slowly heal, recurring and affecting the quality of life. The common factors for an inflamed tooth root with an abscess are odontogenic factors, gingivitis, and periodontitis. If it is caused by odontogenic factors, root canal treatment should be carried out under the guidance of the doctor; if it is caused by gingivitis, periodontitis and other diseases, periodontal treatment, full mouth cleaning and anti-infection treatment should be carried out under the guidance of the doctor. Inflammation of the tooth root with pus should be treated promptly, go to the hospital, ask the doctor to clarify the cause of the disease, followed by targeted treatment.