Keeping the head raised or applying a cold compress to the face can help reduce facial swelling that stems from an injury, explains MedlinePlus. It's best to seek immediate medical attention for facial swelling that develops for any other reason.
A wide range of mild to serious disorders, including an infection, an allergic reaction or even cancer, can cause facial edema, explains Healthgrades. Emergency treatment is especially necessary if pain, fever, difficulty breathing or hives accompany the swelling. Depending on the severity, the facial swelling may spread to the neck and upper arm area. Doctors generally ask a series of questions about the swelling before making a diagnosis, administering treatments or ordering tests, according to MedlinePlus.