Swelling. Kidney failure, hypothyroidism, cirrhosis, anasarca, med reaction to name a few.
Facial Swelling. In addition to the answers already given, other causes include allergic reactions, angioedema, blood transfusion reaction, cellulitis, conjunctivitis, drug reactions, head, nose, jaw injury, injury or trauma to the face, malnutrition when severe, obesity, salivary gland disorders, sinusitis, tooth abscess, stye with swelling around the infected eye.
Face swelling. Lots of reason for swelling including allergic reactions, scarring from procedures done. Or sun damage.