Photodermatoses: Exploring Clinical Presentations, Causative Factors, Differential Diagnoses, and Treatment Strategies

Photodermatoses encompass a group of skin diseases triggered by exposure to UV radiation.Most frequently, these conditions are subcategorized as either photocontact dermatitis (PCD) or photoallergic dermatitis.Although generally non-life threatening, photodermatoses can severely diminish a patient's quality of life and cause considerable distress.Photocontact dermatitis, also known as photoallergy, represents a type of allergic contact dermatitis that develops following exposure to an inciting topical, oral, or environmental allergen with subsequent exposure to sunlight.The distinctive characteristic of PCD is localization to sun-exposed areas of the skin, such as the arms, legs, neck, and face.While uncommon, PCD remains an important consideration in the differential diagnosis in patients presenting with the corresponding clinical manifestations.Collaborative efforts between the patient and physician are vital in identifying potential triggers to prevent future eruptions.P hotosensitivity refers to clinical manifestations arising from exposure to sunlight.Photodermatoses encompass a group of skin diseases caused by varying degrees of radiation exposure, including UV radiation and visible light.Photodermatoses can be categorized into 5 main types: primary, exogenous, photoexacerbated, metabolic, and genetic. 1 The clinical features of photodermatoses vary depending on the underlying cause but often include pruritic flares, wheals, or dermatitis on sun-exposed areas of the skin. 2 While photodermatoses typically are not life threatening, they can greatly impact patients' quality of life.It is crucial to emphasize the importance of photoprotection and sunlight avoidance to patients as preventive measures against the manifestations of these skin diseases.Furthermore, we present a case of photocontact dermatitis (PCD) and discuss common causative agents, diagnostic mimickers, and treatment options. Case ReportA 51-year-old woman with no relevant medical history presented to the dermatology clinic with a rash on the neck and under the eyes of 6 days' duration.The rash was intermittently pruritic but otherwise asymptomatic.