Which condition is characterized by scaly red patches on various parts of the body?

Psoriasis is characterized by the presence of scaly red patches that can appear on various parts of the body, including the elbows, knees, scalp, and lower back. This chronic autoimmune condition leads to the rapid buildup of skin cells, resulting in thick, silvery scales and inflamed red skin. The patches are often itchy and can cause discomfort, and they may worsen or improve in cycles, influenced by factors such as stress or environmental changes.

While other options describe skin conditions, they have different characteristics and underlying causes. Eczema typically presents with itchy, inflamed skin and can result in oozing or crusting, rather than distinct scaly patches. Ichthyosis involves dry, thickened skin that may resemble fish scales but is different in appearance and texture compared to the inflamed lesions of psoriasis. Seborrheic dermatitis primarily affects oily areas of the skin and is marked by red, greasy patches with yellow scales, which is also distinct from the typical presentation of psoriasis.