Dyshidrotic Eczema (Pompholyx): This condition is characterized by small, itchy blisters or red spots on the hands and feet, which matches the description provided. It's a common form of eczema that affects these areas.

Contact Dermatitis: This can occur when the skin on the hands and feet comes into contact with an allergen or irritant, leading to red spots and eczema-like symptoms. Given the location on hands and feet, exposure to such substances is plausible.
Atopic Dermatitis (Eczema): While atopic dermatitis can appear anywhere on the body, it can also manifest on the hands and feet, especially in individuals with a history of atopic conditions. The presence of red spots could be part of an atopic dermatitis flare.
Psoriasis: Psoriasis can cause red, scaly patches on the skin, including the hands and feet. Although it's more commonly associated with other body areas, it should be considered, especially if the red spots are accompanied by thickening of the skin.

Cellulitis: This is a bacterial skin infection that can cause redness, swelling, and warmth, typically on one side of the body. It's crucial to differentiate it from eczema because cellulitis requires antibiotic treatment. The presence of red spots, especially if accompanied by systemic symptoms like fever, should prompt consideration of cellulitis.
Erythema Multiforme: A skin condition characterized by target lesions, which can sometimes appear as red spots. It can be triggered by infections or medications and can affect the hands and feet among other areas.

Keratolysis Exfoliativa: A condition that causes the skin on the palms and soles to peel, which might initially present with red spots before the peeling becomes apparent.
Idiopathic Eruption of the Palms: A rare condition that presents with an eruption of red spots or blisters on the palms of the hands, sometimes extending to the soles of the feet. The cause is unknown, and it can be challenging to diagnose due to its rarity and similarity to other conditions.