The infraorbital nerve is a branch of the maxillary nerve, which is part of the trigeminal nerve system. It runs through the infraorbital foramen, located just below the eye socket, and supplies sensation to the skin of the midface, including the upper lip, cheek, and lower eyelid. In addition to providing sensory information, the infraorbital nerve also innervates the maxillary teeth and the mucous membranes of the nasal cavity and paranasal sinuses. Understanding this nerve is important in dental procedures and facial surgeries, as it can affect sensation and pain management in the midfacial region.