What is the most common skin condition presenting with pruritus, erythema, and scaly lesions in infants?

Atopic dermatitis, commonly known as eczema, is the most prevalent skin condition that presents with pruritus (itchiness), erythema (redness), and scaly lesions in infants. This chronic inflammatory skin condition is characterized by intense itching and often has a genetic predisposition, frequently appearing in the early stages of life.

In infants, atopic dermatitis typically manifests as red, dry patches on the skin, most commonly affecting areas such as the face, scalp, and behind the knees. The condition may exacerbate in response to environmental factors such as heat, humidity, and allergens. Its pruritic nature can lead infants to scratch, which further aggravates the skin inflammation and can lead to secondary infections.

The other skin conditions mentioned may present with similar symptoms, but they have distinct characteristics and are less common in infants. Contact dermatitis, for instance, is often associated with a specific irritant or allergen and has well-defined edges related to the offending substance. Psoriasis is characterized by well-defined plaques and often presents with silvery scales, which are less typical in infants. Seborrheic dermatitis usually affects areas rich in sebaceous (oil) glands, such as the scalp and face, and is often less itchy than atopic