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; ...
A systemic poison ivy rash may spread to areas of the body that had no direct contact with the plant. Using an oatmeal based lotion can soothe a poison ivy rash. Poison ivy. One of the many symptoms of systemic poison ivy is swollen lymph nodes.