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¿Qué es el lupus cutáneo?
Aproximadamente dos tercios de las personas con lupus desarrollarán algún tipo de enfermedad de la piel, llamada lupus eritematoso cutáneo. La enfermedad de la piel en el lupus puede causar erupciones o llagas (lesiones), la mayoría de las cuales aparecerán en las áreas expuestas al sol, como la cara, las orejas, el cuello, los brazos y las piernas. Entre el 40 y el 70 por ciento de las personas con lupus encontrarán que su enfermedad empeora por la exposición a los rayos ultravioleta (UV) de la luz solar o luz artificial.
Un médico que se especializa en el cuidado de la piel, conocido como un dermatólogo(a) debe tratar las erupciones y lesiones cutáneas del lupus. Por lo general, examinará el tejido bajo un microscopio para determinar si una lesión o salpullido se debe a lupus cutáneo. Tomar la muestra de tejido se llama biopsia.
Always wearing sunscreen on the rash and wearing a wide brimmed hat greatly decrease this risk. If you notice any changes in how the rash looks, talk to your doctor right away.
Subacute cutaneous lupus
Subacute cutaneous lupus is a rash with red, ring-shaped sores or scaly patches with distinct edges. The rash commonly occurs on the back, chest, and arms but sometimes extends to the buttocks. It does not affect the face or scalp very often. The rash usually does not scar (like discoid lupus), but it can cause skin discoloration. Subacute cutaneous lupus can occur by itself or as a complication of SLE. One of three cases of subacute cutaneous lupus is due to (or made worse by) commonly used drugs, such as proton pump inhibitors (like pantoprazole and omeprazole) and calcium channel blockers (like nifedipine and diltiazem). This can occur months to years after being on the causative drug.
Acute cutaneous lupus
Acute cutaneous lupus is a rash that happens when you have other lupus symptoms. As opposed to chronic cutaneous lupus, acute cutaneous lupus tends to come on quickly (acutely), doesn’t always last very long, and does not cause skin scarring. However, it can leave behind areas of skin discoloration, like with the subacute form above. Almost everyone with acute cutaneous lupus has systemic lupus erythematosus (SLE).
There are two main forms: localized and generalized.
You may have heard that some people with lupus get a “butterfly rash” or “malar rash.” This is the localized form of acute cutaneous lupus. The term refers to the rash being on the cheeks (malar areas) and bridge of the nose — so it’s shaped like a butterfly. Though many people think of this rash when they think of systemic lupus, the butterfly rash only occurs in around 30% of systemic lupus patients.
Generalized acute cutaneous lupus shows up as raised red rashes all over the body and typically occurs in sick SLE patients.
Non-specific rashes in lupus
Skin inflammation from lupus does not just cause the cutaneous lupus rashes mentioned above. Many SLE patients will have skin involvement with rashes that can occur in other inflammatory or autoimmune conditions. Considering that the mucosa in the nose and mouth are extensions of the skin, nose and mouth sores are two of the most common examples of nonspecific skin involvement. Other examples include hives (urticaria), angioedema, cutaneous vasculitis, skin ulcers, bruises, livedo reticularis, telangiectasias, palmar erythema (red palms), erythema nodosum, and vitiligo. These are too numerous and complicated to discuss here, but it is important to mention them since they do commonly occur in SLE patients.
Cutaneous lupus in people of color
Though lupus occurs much more frequently in people of color, there is a lack of photos on the internet. The Lupus Foundation is working on correcting this problem. The red and pink rashes that we commonly talk about occurring on light skin tones may appear dark purple or dark brown on dark skin tones, making them easy to miss by inexperienced health care providers.
How can I keep my skin healthy?
There are steps you can take to protect your skin.
Protect yourself from UV rays
The ultraviolet (UV) rays in sunlight and some indoor lights can make rashes and other lupus symptoms worse. Learn how to protect your skin from UV rays.
See a doctor
A dermatologist is a type of doctor who treats skin health problems. There are many types of dermatology, such as cosmetic dermatologists and surgical dermatologists. It is important to find a dermatologist who knows a lot about lupus.
The best type of dermatologist for lupus patients is a medical dermatologist. Medical dermatologists specialize in caring for skin involvement from medical conditions, like lupus. A good way to find a medical dermatologist is to contact a dermatology clinic associated with a large medical center or teaching hospital, ask your rheumatologist, or search for one online who states they specialize in medical dermatology or lupus.
They can do tests to find out if your rashes or sores are related to lupus. Be sure to tell the doctor how long you’ve had the rash — and if you’ve noticed any changes in how it looks.
The dermatologist may take a sample of your skin called a biopsy. That way, they can look at the sample under a microscope to see the rash up close.
Realize that it is common to develop rashes for other things other than lupus, for example, drug reactions, allergies or sensitivities, or unrelated inflammatory problems, like eczema or psoriasis. It is imperative to have a correct diagnosis to get the correct treatment. Consider building a close relationship with a medical dermatologist in your area as your first point of contact for any new rash, and ensure they work closely with your rheumatologist (if you have one).
Es el tipo más común de lupus. Es a lo que la mayoría de las personas se refiere cuando hablan de “lupus”
Un tipo de lupus que se limita a la piel.
Una enfermedad similar al lupus causada por ciertos medicamentos recetados por un médico.
Una afección rara que afecta a los recién nacidos de mujeres que tienen lupus.
Richard D. Sontheimer, MD
Specialist in the skin changes that occur in autoimmune rheumatic diseases like lupus. Read Bio