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; ...
Other medications that can cause flushing are corticotropin- releasing hormone, doxorubicin, and niacin (Box 1). Flushing is a side effect of sildenafil citrate in 12% of patients. Systemic administration of morphine can cause flushing of the face, neck, and upper shoulders, which is believed to be histamine-mediated.