0 the fact of some areas of skin being darker than others, often caused by skin damage or certain medical conditions :
Prolonged thermal radiation exposure to the skin can lead to the development of reticulated erythema, hyperpigmentation, scaling and telangiectasias in the affected area.
Hyperpigmentation can be diffuse or focal, affecting such areas as the face and the back of the hands.
The most common presentation is hepatic cirrhosis in combination with hypopituitarism, cardiomyopathy, diabetes, arthritis, or hyperpigmentation.
In exogenous ochronosis, the hyperpigmentation is localized to the area where the inciting agent is applied.
Phytophotodermatitis usually results in hyperpigmentation of the skin that often appears like a bruise.
The presence of a cactus granuloma lesion is often followed by post-inflammatory hyperpigmentation.
Red blood cell extravasion and deposition of hemosiderin that follows clinically appears as hyperpigmentation.
The furanocoumarin in the plant can cause phytophotodermatitis and hyperpigmentation.
