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; ...
Exposure to poison ivy, oak, or sumac causes an itching skin rash that usually appears within 24-72 hours. The rash usually starts as small red bumps and later develops blisters of variable size. The rash may crust or ooze. It may look like red, bumpy lines or streaks on the skin.