Lupus Rash and Sun Sensitivity: Types, Triggers and Sun Protection

By Anna Curran, RN, BSN, PHN · Last reviewed October 2026

A lupus rash is a skin rash caused by lupus inflammation. The best known is the butterfly rash across the cheeks and nose, but lupus can also cause round, scaly discoid patches and ring-shaped or scaly rashes on sun-exposed skin. Ultraviolet (UV) light is one of the biggest triggers, so daily sun protection is a key part of treatment.

The Lupus Foundation of America says most people with lupus have it affect their skin at some point. Some people have skin lupus only. Others have skin symptoms along with systemic lupus (SLE). Here is how to tell the main types apart and how to protect your skin.

Why Lupus Affects the Skin

Lupus is an autoimmune disease. Your immune system attacks your own healthy tissue by mistake, and the skin is a common target. You can read more in our guide to what lupus is.

Lupus that affects the skin is called cutaneous lupus. It comes in several forms. Each looks a little different, shows up in different places and heals in different ways.

Types of Lupus Rash

Butterfly (malar) rash

This is the rash most people picture. It is a rash that spreads across both cheeks and the bridge of the nose, often in the shape of a butterfly. It may be flat or raised.

It often shows up or gets worse after time in the sun. The Lupus Foundation of America reports that it occurs in only about 30% of people with SLE, so not having it does not rule out lupus.

The butterfly rash is a form of acute cutaneous lupus. Cleveland Clinic notes this type tends to appear during a lupus flare. It can also show up on the arms, legs or other areas. The Lupus Foundation says almost everyone with acute cutaneous lupus also has SLE.

Discoid lupus

Cleveland Clinic calls discoid lupus the most common form of cutaneous lupus. It causes:

Round, coin-shaped patches that are thick and scaly
Patches most often on the face, scalp and ears
Scarring as the patches heal

Discoid patches on the scalp can cause hair loss. The American Academy of Dermatology (AAD) warns that this hair loss can be permanent once scarring sets in. In darker skin, discoid lupus can also leave dark spots or light spots.

The Lupus Foundation reports that only about 20% of people with discoid lupus also have SLE. Many people have discoid lupus alone. Rarely, skin cancer can form in discoid sores that have been there a long time. The Lupus Foundation notes that sunscreen and a wide-brimmed hat greatly lower this risk.

The AAD stresses that prompt treatment can help prevent scarring and color changes. Do not wait to get a new patch checked.

Subacute cutaneous lupus (SCLE)

This type shows up on skin that gets sun, like the arms, shoulders, neck, chest and back. It often looks like:

Red, scaly patches that can look like psoriasis or eczema
Ring-shaped patches that join together into connected circles

SCLE is strongly linked to sun exposure. Cleveland Clinic notes it does not scar, but it may leave lighter areas of skin.

Some medicines can trigger SCLE. The Lupus Foundation of America reports that about one in three cases is caused or made worse by common medicines. Examples include some acid reflux medicines (proton pump inhibitors like omeprazole and pantoprazole) and some blood pressure medicines (calcium channel blockers like nifedipine and diltiazem). It can appear months or even years after starting the drug.

Do not stop any medicine on your own. If you think a medicine is involved, talk with your doctor.

Other lupus skin changes

Lupus can also cause:

Sores in the mouth or nose, which are often painless
Thinning hair, which may grow back, or patchy hair loss from scarring
Less common rashes, such as chilblain lupus, which causes painful bumps triggered by cold, damp weather

Lupus and Sun Sensitivity (Photosensitivity)

Photosensitivity means your skin reacts strongly to UV light. In lupus, UV light can trigger a new rash or make an old one worse. For some people, it can also bring on fatigue, joint pain or a wider flare. Learn more in our article on lupus flare triggers.

UV light comes from the sun. According to the Lupus Foundation of America and the AAD, some indoor lights can give off UV light too.

Cleveland Clinic lists other lupus rash triggers, including infection, injury to the skin, certain medicines, smoke exposure, stress and temperature changes.

Sun Protection Tips for Lupus Rash

Sun protection is part of treatment, not just a nice extra. These tips come from the AAD, Cleveland Clinic and NYU Langone.

Use the right sunscreen

Choose a broad-spectrum sunscreen that is SPF 30 or higher and water-resistant.
Apply it about 15 minutes before going outside.
Reapply every 2 hours, and after swimming or sweating.
Do not forget your scalp, ears and the part in your hair. NYU Langone notes cutaneous lupus often affects these areas.
Cleveland Clinic suggests wearing sunscreen every day, even indoors.
If you have darker skin, the AAD suggests a tinted sunscreen so it will not leave a white cast.

Cover up

Wear a wide-brimmed hat and long sleeves.
Look for clothing with a UPF (ultraviolet protection factor) number on the label. The AAD says this offers better protection.
Use an umbrella for shade when you are out.

Time your outdoor plans

Stay inside as much as you can between 10 a.m. and 4 p.m., when UV rays are strongest.
Seek shade whenever you are outside.
Do not tan in the sun or use tanning beds.

Protect yourself indoors

The AAD suggests replacing fluorescent, compact fluorescent and halogen bulbs with LED or incandescent bulbs.
If you cannot change the bulbs, such as at work, the AAD suggests a UV filter or light shield. Sunscreen, a hat and protective clothing help too.
Cleveland Clinic suggests UV-protective window coverings and moving your desk or chair away from windows.

Do not smoke

The AAD reports that smoking is linked to worse cutaneous lupus. It may also make antimalarial medicines like hydroxychloroquine work less well. If you smoke, ask your doctor for help quitting.

How Lupus Rashes Are Diagnosed and Treated

Diagnosis

A dermatologist (skin doctor) can often tell a lot from looking at your skin, hair and nails. According to the AAD, they may also:

Ask about mouth sores, past rashes, new medicines and family history
Do a skin biopsy, where a tiny piece of skin is checked under a microscope. This can be done in the office.
Order blood tests. The AAD notes blood tests alone cannot confirm lupus.

Treatment

Treatment depends on the type of rash and how much skin is involved. The AAD lists:

Sun protection for everyone
Steroid creams, ointments or shots for thick patches
Antimalarial medicines such as hydroxychloroquine, which can take 2 to 3 months to work
Tacrolimus ointment for skin that cannot use steroids
Other options if those do not work, such as methotrexate, mycophenolate, retinoids, dapsone or biologics
Laser treatment for some thick patches, dark spots or scars

For more on lupus medicines, see our lupus treatment options guide.

When to See a Dermatologist

Cleveland Clinic suggests seeing your doctor for a rash that:

Appears suddenly with no known cause
Shows up on your lips or inside your mouth
Itches or hurts
Lasts for weeks
Gets worse even with treatment

Also see a dermatologist for any scaly patch on your scalp, a patch that is scarring, or a sore that will not heal. Many people see both a dermatologist and a rheumatologist.

Call 911 or go to the ER if a new rash comes with trouble breathing, swelling of your face, lips or throat, or chest pain. Get same-day care for a rash with a high fever or skin that is blistering or peeling.

Frequently Asked Questions

What does a lupus rash look like?

It depends on the type. A butterfly rash covers the cheeks and nose. Discoid lupus causes thick, round, scaly patches that can scar. SCLE causes scaly or ring-shaped patches on sun-exposed skin.

Can a lupus rash appear without sun exposure?

Yes. UV light is a common trigger, but infection, stress, skin injury and some medicines can trigger rashes too. Some indoor lights also give off UV light.

Does a lupus rash mean I have systemic lupus?

Not always. The Lupus Foundation of America reports that only about 20% of people with discoid lupus also have SLE. Your doctor may order tests to check.

Does a lupus rash leave scars?

Discoid lupus can scar and cause permanent hair loss, so early treatment matters. SCLE usually does not scar but may leave lighter skin.

The Bottom Line

A lupus rash can take several forms, including the butterfly rash, discoid lupus and subacute cutaneous lupus. UV light from the sun and some indoor bulbs is a major trigger. Daily broad-spectrum SPF 30 or higher sunscreen, UPF clothing, a wide-brimmed hat and avoiding midday sun can help prevent rashes and flares. See a dermatologist early for new, scaly or scarring patches to protect your skin and hair.