What skin condition appears as red, itchy patches or plaques on the skin's surface?

The skin condition that typically presents as red, itchy patches or plaques on the skin's surface is eczema. Eczema, also known as atopic dermatitis, is characterized by inflamed, itchy skin that can appear as dry, red patches. These patches can be quite uncomfortable and often occur in chronic episodes, where flare-ups may be triggered by various factors such as allergens, stress, or changes in weather.

In contrast, psoriasis is usually marked by thick, silvery scales and red patches but tends to be less itchy and more characterized by the buildup of skin cells. Vitiligo is a condition where pigmentation is lost, resulting in lighter patches of skin rather than red, itchy areas. Rosacea, on the other hand, is characterized by facial redness and visible blood vessels, primarily affecting the central face and not typically presenting as itchy patches.

Understanding these differences is key in identifying the correct condition based on its symptoms.