Phytophotodermatitis

Phytophotodermatitis: Cutaneous Reaction to Plants and Sunlight

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Phytophotodermatitis reaction on a hand

Phytophotodermatitis, also known as berloque dermatitis or margarita photodermatitis, is a phototoxic inflammatory reaction of the skin. This condition occurs due to contact with certain plant substances followed by exposure to ultraviolet light, typically from the sun.

Definition and Mechanism

Phytophotodermatitis is caused by skin contact with photosensitizing compounds found in some plants and then exposure to ultraviolet (UV) rays. The primary photosensitizing agents are furocoumarins, present in plants like limes, celery, and parsley.

Symptoms and Presentation

Blistering due to Phytophotodermatitis

Typical symptoms include erythema (skin redness), edema (swelling), blisters (vesicles and bullae), and delayed hyperpigmentation. The severity of the reaction can vary, with some cases showing mild redness and others developing severe blistering.

Risk Factors

Factors that increase the risk of phytophotodermatitis include handling of the causative plants, especially under hot and moist conditions, and subsequent exposure to sunlight.

Diagnosis

Diagnosis is often clinical, based on the characteristic appearance of the lesions and a history of potential exposure. Dermatologists may use patient history and skin examinations to confirm the diagnosis.

Treatment and Management

Treatment involves managing symptoms, which may include topical steroids for inflammation and pain relief. Avoiding further exposure to sunlight can prevent exacerbation of the condition.

Prevention

Prevention strategies include wearing protective clothing and washing skin thoroughly after handling potential photosensitizing plants, followed by minimizing sun exposure.

Epidemiology

This condition can affect individuals of all ages but is more common in those frequently handling plants, such as gardeners and agricultural workers.

See Also

• Photodermatitis
• Dermatitis
• Skin conditions

External Links

• American Academy of Dermatology - Phytophotodermatitis Overview
• World Health Organization - Skin Conditions

Phytophotodermatitis Resources
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