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; ...
But thatâs not the case. The CDC estimates that 80% to 90% of adults are allergic to urushiol, the oil in poison ivy -- and poison oak and poison sumac -- that causes the reaction. It is true that you can come in contact with poison ivy and not develop a rash the first time.