An illustration showing four different stages of<unk> , including one (Fig. 4 top right) caused by an obstacle to the return of the venous blood due to heart disease. Symptoms may include a change in skin color to red or black, numbness, pain, skin breakdown, and coolness. The feet and hands are most commonly involved.
Gangrene
Scleredema
Blister
Diabetic bulla
Tar melanosis
Dandruff
Athlete's foot
Sunburn