The trigeminal nerve is located in the cranium, branches into three smaller nerves, and controls most of the feeling you have in your face.
The ophthalmic nerve is responsible for feeling in the upper eyelid and forehead.
The maxillary nerve is responsible for feeling in the lower eyelid, cheek, nostril, upper lip and upper gum.
The mandibular nerve is responsible for feeling in the jaw, lower lip, lower gum and other muscles in the mouth.