Infiltration anesthesia is a type of local anesthesia and is relatively commonly used in clinical practice. It is a method of injecting anesthetic drugs into the surgical site, subcutaneous tissue, mucous membranes, and deep tissues to anesthetize sensory nerve endings or nerve trunks, causing them to lose the ability to sense and transmit stimuli. Commonly used drugs include lidocaine, bupivacaine, procaine, etc. It is often used in surgeries with a relatively large scope in the oral and facial soft tissues and is also quite practical for areas above the periosteum or under the mucous membranes, such as in dental and alveolar surgical procedures.