What is a likely diagnosis for an 18-year-old female with scaly, erythematous upper extremity lesions and a history of allergic rhinitis?

The diagnosis of eczema, specifically atopic dermatitis, is highly plausible in this case based on the symptoms and history presented. Eczema is a chronic inflammatory skin condition that often manifests as scaly, erythematous lesions, particularly in individuals with a history of atopy, such as allergic rhinitis, asthma, or food allergies.

In this scenario, the 18-year-old female exhibits scaly, erythematous lesions on her upper extremities. Eczema commonly affects the flexural areas but can also appear on the hands, which might explain the location of the lesions. The presence of allergic rhinitis suggests a predisposition to various allergic conditions, which aligns with the typical profile of individuals prone to atopic dermatitis.

Eczema often presents with pruritic (itchy) patches, and while other skin conditions can mimic the appearance of eczema, the linkage between her allergic rhinitis and the skin findings makes atopic dermatitis a strong candidate for the diagnosis.

In contrast, psoriasis typically presents with thicker, silvery plaques and has a different distribution. Contact dermatitis would be more localized and usually related to an identified irritant or allergen, without necessarily relating to a systemic allergic condition. A fungal infection usually presents with distinct characteristics