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; ...
Poison ivy, oak, and sumac facts. 1  Poison ivy, poison oak, and poison sumac are plants than can cause an itchy rash upon contact.  A substance called urushiol, found in these plants, causes the rash.