A Seldom Seen Complication in the Inferior Alveolar Nerve Block.

PURPOSE: Introduce Kuhn anemia as a complication during the inferior alveolar nerve block (IANB). METHODS: Here, the authors reported a lesser-known complication called Kuhn anemia during the IANB. Then, the authors searched and reviewed relevant literature on the Web of Science. RESULTS: Vasospasm of the maxillary artery results in the phenomenon. Reasons, such as inaccurate injection, anatomical variation, drug diffusion, and so on, may account for the complication during the IANB. CONCLUSIONS: All in all, doctors should be prudent before and during the surgery.