How does discoid lupus affect the skin?

Discoid lupus is a form of lupus erythematosus that specifically affects the skin, typically without involving internal organs.1

The condition manifests as an erythematous (reddened) raised, patchy eruption. These distinct patches are often covered with grayish-brown scales and can appear on the face, neck, and scalp, though they may occur anywhere on the body. A key characteristic of these lesions is that they heal with scarring and atrophy of the skin.21

While discoid lupus is primarily a skin-limited condition, it is important to note that in approximately 10 percent of cases, the disease may evolve into the more severe systemic lupus erythematosus.1