Incisor pain and slight loosening may be due to periodontal disease, periapical disease, tooth fracture, physiological root resorption and other reasons, it is recommended to go to the hospital for specific examination and treatment. 1. Incisors with loss of gingival attachment and periodontal pockets may be due to periodontal disease causing incisor pain and loosening, usually caused by subgingival calculus irritation. 2. Inflammation at the root tip of incisors can lead to pus at the root tip, pain on percussion, and loosening of the tooth. 3. Teeth that bite hard objects or are hit by external forces may fracture, and the teeth will be painful and loose. 4. In the period of tooth replacement, the roots of milk teeth are gradually absorbed, and the teeth will be loosened with pain, which is the physiological absorption of teeth, the milk teeth will be replaced by permanent teeth, which is a normal phenomenon.