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Erythema (Ancient Greek: ἐρύθημα, from Greek erythros 'red') is redness of the skin or mucous membranes, caused by hyperemia (increased blood flow) in superficial capillaries. [1] It occurs with any skin injury, infection, or inflammation. Examples of erythema not associated with pathology include nervous blushes. [2]
Photodermatitis, sometimes referred to as sun poisoning or photoallergy, is a form of allergic contact dermatitis in which the allergen must be activated by light to sensitize the allergic response, and to cause a rash or other systemic effects on subsequent exposure.
The skin response resembles an exaggerated sunburn. The involved chemical may enter into the skin by topical administration, or it may reach the skin via systemic circulation following ingestion or parenteral administration. The chemical needs to be "photoactive," which means that when it absorbs light, the absorbed energy produces molecular ...
Infected skin is typically very red, swollen, tender, warm and painful to the touch. If the infection is left untreated, it can spread throughout your body and quickly become life-threatening.
We talk to skin care experts about skin redness, finding out the various causes and what we can do to alleviate it. Plus, products to shop.
Photosensitivity is the amount to which an object reacts upon receiving photons, especially visible light.In medicine, the term is principally used for abnormal reactions of the skin, and two types are distinguished, photoallergy and phototoxicity.
Red skin may refer to: Flushing (physiology), to temporarily become markedly red in the face or other areas of the skin; Erythroderma, an inflammatory disease of the skin that causes a red appearance along with scaling; Erythema, a symptom describing redness of skin or mucous membranes caused by increased blood flow in the superficial capillaries
During this process, a lamp that uses long-wave ultraviolet (UV) light will make certain cells show color or appear fluorescent, according to the Cleveland Clinic. Doctors also take time during ...