Which skin condition is characterized by the presence of red, scaly patches?

The skin condition characterized by the presence of red, scaly patches is psoriasis. This chronic autoimmune condition results in the rapid growth of skin cells, which leads to the development of thick, scaly plaques that are often red and covered with silvery-white scales. These patches most commonly occur on the elbows, knees, scalp, and lower back, although they can appear on any part of the body. The inflammatory nature of psoriasis can lead to discomfort and sometimes itching, and the patches can vary in size and severity.

Eczema, another skin condition, typically presents with dry, itchy skin and may feature red patches, but these are often associated with a more moist or oozing texture, rather than the thick and scaly appearance seen in psoriasis. Rosacea primarily affects the face and can cause redness and visible blood vessels, but it does not usually present as scaly patches. Acne involves the appearance of pimples, blackheads, and cysts rather than red, scaly patches on the skin. Therefore, the characteristics of psoriasis distinctly match the description of red, scaly patches in the question.