Which type of dermatitis is usually associated with a high degree of itching?

Atopic dermatitis is indeed characterized by a high degree of itching, making it the most appropriate choice for this question. This condition is often associated with a history of allergies or asthma and typically presents as dry, itchy, and inflamed skin. The intense itchiness can lead to a cycle of scratching that exacerbates the skin condition.

In contrast, while contact dermatitis may also cause itching, it tends to be more localized and often resolves once the irritant or allergen is removed. Seborrheic dermatitis, on the other hand, usually manifests with scaling and can involve oily areas of the skin, but is generally less itchy compared to atopic dermatitis. Nummular dermatitis presents as coin-shaped patches and can be itchy, but the severity and persistent nature of the itch are more pronounced in atopic dermatitis. Therefore, its association with significant itching is what makes atopic dermatitis the correct response to this question.