Contact Dermatitis: This is the most likely diagnosis given the history of using traditional creams from an unknown source. The creams could contain allergens or irritants that triggered an allergic contact dermatitis, leading to a vesicular eruption.

Irritant Contact Dermatitis: Similar to allergic contact dermatitis, but this would be a non-immunologic reaction to an irritant in the creams, leading to skin inflammation and vesicles.
Eczema Herpeticum: A complication of atopic dermatitis (eczema) where the skin becomes infected with the herpes simplex virus, leading to widespread vesicular lesions. Although less likely without a clear history of fever or systemic symptoms, it's a consideration given the child's eczema.
Allergic Reaction to Topical Steroids: If the traditional creams contained topical steroids, an allergic reaction could occur, especially if the child has been using them for an extended period.

Staphylococcal Scalded Skin Syndrome (SSSS): A serious condition caused by staphylococcal toxins that could present with widespread vesicles and skin peeling. It's crucial to consider this diagnosis due to its potential severity and need for prompt antibiotic treatment.
Toxic Epidermal Necrolysis (TEN): A life-threatening skin condition usually triggered by medications. Although less common in children and typically associated with drug intake, it's essential not to miss this diagnosis due to its high mortality rate.

Pemphigus Vulgaris: An autoimmune disease that can cause blistering of the skin and mucous membranes. It's rare in children and would be an unusual presentation in a 2-year-old with eczema.
Bullous Pemphigoid: Another autoimmune blistering disease that is rare in children and would be an uncommon diagnosis in this scenario.
Linear IgA Bullous Dermatosis: A rare autoimmune disorder characterized by blistering skin lesions. It's less likely but could be considered if other diagnoses are ruled out.