What is redness?

It is a coloration of the skin that can be caused by a variety of reasons, the most common is caused by histamine reactions that open the blood capillaries in the skin to make it appear red, called erythema.
It is a coloration of the skin that can be caused by a variety of reasons, the most common is caused by histamine reactions that open the blood capillaries in the skin to make it appear red, called erythema.