When skin is rewarmed after being very cold or frozen, it is normal
to have pain, warmth, and redness as blood flow returns to the area. Swelling
that develops after rewarming cold skin may be caused by a cold injury or
infection. It is very difficult to tell the difference between normal recovery
from cold exposure and a problem such as infection.
Symptoms of a skin infection may include:
Increased pain, swelling, redness, or warmth
around the injury.
Red streaks extending from the
Drainage of pus from the injury.
nodes in the neck, armpit, or groin.
An infection most often develops when bacteria enter broken skin
(such as a popped blister). What starts as a minor wound infection can lead to
a serious infection, such as: