Photosensitivity in humans
Polymorphous light eruption, also known as polymorphic light eruption, is a rash caused by sun exposure in people who have developed sensitivity to sunlight. The rash usually appears as red, tiny bumps or slightly raised patches of skin. Polymorphous light eruption (PMLE). PMLE is a reaction that does not appear to be linked to drugs or diseases. It happens in people who are at risk and who are exposed to intense sunlight that.
Light sensitivity or photosensitivity refers to a notable or increased reactivity to light. Apart from visionhuman beings have many physiological and psychological responses to light. In rare individuals an atypical response may result in serious discomfort, disease, or injury. Some drugs have a photosensitizing effect. Properties of natural or artificial light that may abnormally affect people include:. Conditions that may include sensitivity to light include vertigo and chronic fatigue syndrome.
Controlled application of artificial light can be used in a program of light therapy to treat some disorders. Sunlight, especially its ultraviolet radiation component, can cause increased or additional types of damage in predisposed individuals, such as those taking certain phototoxic drugs, or those with certain conditions associated with photosensitivity, including:.
The Scientific Committee on Emerging and Newly Identified Health Risks SCENIHR in reviewed  the connections between light from fluorescent lampsespecially from compact fluorescent lampand numerous human diseases, with results including:.
From Wikipedia, the free encyclopedia. For broader coverage of this topic, see Photosensitivity. Main article: Health effects of sun exposure. This section called "Fluorescent lamps" possibly contains inappropriate or misinterpreted citations that do not verify the text.
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Further information: Fluorescent lamps and health. Asthenopia eye strain Photophobia Phototoxicity Photosensitivity Photosensitivity in animals Photodermatitis Phytophotodermatitis.
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What is tinea faciei?
Plinian eruption - a volcanic eruption in which a stream of gas and ash is violently ejected to a height of several miles 2. eruption - symptom consisting of a breaking out and becoming visible. Polymorphous light eruption. Polymorphous light eruption occurs on skin a few hours after it has been exposed to sunlight. As its name suggests, it can take many forms, but generally consists of small or large raised red spots. Target like lesions are less common. Polymorphous light eruption is a condition affecting the skin thought to be caused by an adverse reaction to ultraviolet light. Its prevalence across Europe is % of the population. Artificial light sources may provoke the condition, and compact fluorescent light have been shown to produce an eruption.
DermNet provides Google Translate, a free machine translation service. Note that this may not provide an exact translation in all languages. Tinea faciei is the name used for infection of the face with a dermatophyte fungus. It does not include infection of the beard and moustache area, which is called tinea barbae. Tinea faciei is uncommon and often misdiagnosed at first. Tinea faciei can be due to an anthropophilic human fungus such as Trichophyton rubrum T rubrum. Infection often comes from the feet tinea pedis or nails tinea unguium originally.
Zoophilic animal fungi such as Microsporum canis M canis , from cats and dogs, and T verrucosum, from farm cattle, are also common. Tinea faciei resembles tinea corporis ringworm. It may be acute sudden onset and rapid spread or chronic slow extension of a mild, barely inflamed, rash.
There are round or oval red scaly patches, often less red and scaly in the middle or healed in the middle.
It is frequently aggravated by sun exposure. It may also present as a kerion fungal abscess. Misdiagnosis is particularly common in those treated with topical steroids or oral steroids tinea incognita. The diagnosis of tinea faciei is confirmed by microscopy and culture of skin scrapings. Tinea faciei is usually treated with topical antifungal agents , but if the treatment is unsuccessful, oral antifungal medicines may be considered, including terbinafine and itraconazole.
See smartphone apps to check your skin. DermNet NZ does not provide an online consultation service. If you have any concerns with your skin or its treatment, see a dermatologist for advice.
Tinea faciei — codes and concepts open. Ringworm of face. Fungal infection, Age site specific. Facial dermatophytosis, T.