Which nerve extends to the lower eyelid, side of the nose, upper lip and mouth?

The infraorbital nerve is responsible for providing sensory innervation to the lower eyelid, side of the nose, upper lip, and portions of the mouth. It is a branch of the maxillary nerve, which itself is part of the trigeminal nerve. This nerve carries sensory information from these facial regions back to the brain, allowing for the perception of touch, pain, and temperature.

The lower eyelid and side of the nose are primarily innervated by the infraorbital nerve. Additionally, the upper lip and parts of the mouth receive sensory input from this nerve, facilitating various functionalities such as facial expressions and the perception of various sensations in these areas. Understanding the role of the infraorbital nerve is significant for tasks involving cosmetic procedures and other dermatological considerations in the context of cosmetology and aesthetics.