The symptoms of painful and loose teeth may have two causes: the first one may be caused by acute periapical inflammation. The main symptoms of acute periapical inflammation are spontaneous pain, biting pain and a certain degree of tooth loosening that may exist in the patient. It is recommended that patients go to the endodontics department in a timely manner, under the diagnosis and treatment of professional physicians to open the pulp drainage, after the control of the inflammation of periapical periodontitis, tooth pain will be reduced, and the looseness will slowly turn to normal. The second may be caused by chronic periodontitis, the main symptoms of chronic periodontitis are bleeding gums, loose teeth, alveolar bone atrophy, receding gums and other symptoms. In general, periodontitis does not cause pain, if it causes pain, it is possible that the degree of periodontitis is more serious, the alveolar bone resorption to the tip of the root resulting in retrograde pulpitis. It is recommended that the patient visit a periodontist in a timely manner to determine the treatment plan under the guidance of a professional physician and to determine whether the tooth has any retention value. Patients are advised to take care of oral hygiene and brush their teeth carefully in daily life.