The color of skin: Red diseases of the skin, nails, and mucosa

摘要: Red color is pervasive in local and systemic skin conditions. It a that often reflects variations of dermal blood flow extends beyond the rubor calor inflammation. The pathophysiology red involves remote chemical mediators dilate arteriolar smooth muscle increase to superficial vessels capillary beds. Incident light hits hemoglobin, which preferentially absorbs shorter wavelengths, such as blue, warmer colors. Due its pervasiveness consistency, useful descriptive factor helping narrow differential diagnosis. disorders include variety conditions involving endocrine mediators, cardiovascular responses, disruption barrier. An understanding blood's role these equips clinicians generate diagnoses through lens pathophysiology. Dermatologists can improve management by considering part disease rather than an isolated incident.