What is photosensitivity a symptom of?

What is photosensitivity a symptom of?

Photosensitivity reactions include solar urticaria, chemical photosensitization, and polymorphous light eruption and are usually characterized by an itchy eruption on patches of sun-exposed skin. People may inherit a tendency to develop these reactions. Certain diseases, such as systemic lupus erythematosus.

What plant causes photodermatitis or photosensitivity?

Phototoxic species. Plants associated with phytophotodermatitis mainly come from four plant families: the carrot family (Apiaceae), the citrus family (Rutaceae), the mulberry family (Moraceae), and the legume family (Fabaceae).

What diseases can cause photosensitivity?

Examples of photoaggravated diseases include lupus erythematosus, erythema multiforme, atopic eczema, psoriasis, viral exanthemata, pemphigus, dermatitis herpetiformis and rosacea. Drugs and chemicals may interact with UV to induce photosensitivity.

What does plant dermatitis look like?

Allergic reactions may be spread with the hands to other sites of the body, such as the face, eyelids, and genitals. Plant dermatitis classically shows linear blisters where the skin brushed against the causative plant.

What is the most common way to get phytophotodermatitis?

Phytophotodermatitis is most commonly caused by ingestion of or topical exposure to psoralens (furocoumarins). Psoralens have been isolated from at least 4 different plant families: Umbelliferae, Rutaceae, [9, 10] Moraceae, and Leguminosae.

What are photosensitisers?

These agents are called photosensitisers and can be topical agents or medications that are taken orally. The following table lists the most common medications and topical agents causing photosensitivity.

What are the photosensitising properties of drugs used for?

The photosensitising properties of some drugs are sometimes used for therapeutic purposes in photodynamic therapy ( PDT) and photochemotherapy ( PUVA ). What are the clinical features of drug-induced photosensitivity?

What is drug-induced photosensitivity?

Author: Vanessa Ngan, Staff Writer, 2006. What is drug-induced photosensitivity? Drug-induced photosensitivity occurs when certain photosensitising medications cause unexpected sunburn or dermatitis (a dry, bumpy or blistering rash) on sun- exposed skin (face, neck, arms, backs of hands and often lower legs and feet).

What are the three types of photosensitivity?

The three forms of photosensitivity are main (type I) photosensitivity, aberrant endogenous pigment synthesis (type II) photosensitivity, and hepatogenous (secondary, type III) photosensitivity. Idiopathic (type IV) photosensitivity has been identified as a fourth group.