Both subacute cutaneous lupus and discoid lupus are a form of lupus skin disease, though they have some distinct differences.

Subacute cutaneous lupus may show up as ring-shaped red, scaly lesions. The sun-exposed parts of the arms, shoulders, neck, and body are usually the most affected. The wounds don't usually itch or scar, although they can get discolored.

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Chronic cutaneous lupus (also known as discoid lupus) shows up as disk-shaped, circular skin sores that are typically reddish, flaky, and thick. These lesions are often painless, and most commonly appear on the scalp and face, though can appear on different parts of the body as well. The skin can scar or appear discolored over time, and scalp lesions that scar can cause permanent hair loss.

There are tests that your doctor can use to determine if you have subacute cutaneous lupus or discoid lupus. There are also a number of treatments available for these conditions.

To learn more, read What is cutaneous lupus?

The Lupus Foundation of America and our health education specialists have answered some of your most common questions. The provided answers are for educational and information purposes only. Consult with your doctor/health care team for medical advice.