Prior to the onset of hypothermia the body maintains a relatively stable temperature whereby heat production is balanced by heat loss. When the outside environment gets too cold or the body's heat production decreases, hypothermia occurs (hypo=less + thermia=temperature).
The main symptom of poison oak, ivy, or sumac is an intensely itchy, red rash. ... However, you should contact a doctor right away if you are highly sensitive or have the following symptoms: Swelling of the face or throat; Rash on the genitals; ...
Conjunctivitis may also cause facial swelling. Conjunctivitis is redness and swelling of the conjunctiva, the mucous membrane that covering the eyeball and under surface of the eyelid. Drug reactions. Drugs such as aspirin, penicillin, sulfa, glucocorticoids, and others are common fluid retention in the face causes. Further reading Allergic Reaction Face Swelling and Brain Cancer and Face Swelling-Steroids to Treat Hydrocephalus.