Understanding Sjögren's Syndrome
Sjögren's syndrome is a chronic autoimmune disorder that primarily affects the body's moisture-producing glands, particularly the salivary glands in the mouth and the lacrimal (tear) glands in the eyes. In Sjögren's syndrome, the immune system mistakenly attacks these glands, causing inflammation that reduces their ability to produce moisture. This leads to the hallmark symptoms of dry eyes and dry mouth. While dryness is the most common complaint, Sjögren's syndrome is a systemic disease that can affect many parts of the body, including the joints, skin, lungs, kidneys, blood vessels, and nervous system. Sjögren's syndrome can occur alone (primary Sjögren's syndrome) or alongside other autoimmune diseases such as rheumatoid arthritis or lupus (secondary Sjögren's syndrome). While there is no cure, treatment can relieve symptoms and prevent complications.
What Happens in Sjögren's Syndrome?
In Sjögren's syndrome, the immune system produces antibodies and white blood cells that infiltrate and attack the exocrine glands, particularly the salivary and lacrimal glands. This immune attack causes chronic inflammation that damages the glands' ability to produce saliva and tears. The inflammation can also affect other moisture-producing glands throughout the body, including those in the nose, throat, skin, and vagina. Beyond the glands, Sjögren's syndrome can cause widespread inflammation affecting connective tissues, joints, muscles, blood vessels, and organs. The exact cause of Sjögren's syndrome is unknown, but it likely results from a combination of genetic predisposition, hormonal factors (given its higher prevalence in women), and environmental triggers such as viral or bacterial infections.
Who Gets Sjögren's Syndrome?
Sjögren's syndrome can affect anyone, but certain factors increase risk. Women are about nine times more likely to develop Sjögren's syndrome than men. The condition most commonly develops between ages 40 and 60, though it can occur at any age, including in children. People with other autoimmune diseases such as rheumatoid arthritis, lupus, scleroderma, or thyroid disease have a higher risk of developing secondary Sjögren's syndrome. Having a family history of Sjögren's syndrome or other autoimmune disorders increases risk, suggesting a genetic component. Certain genetic markers, particularly specific HLA genes, are more common in people with Sjögren's syndrome.
Common Symptoms
Sjögren's syndrome symptoms can range from mild to severe and may develop gradually. The hallmark symptoms involve dryness, but the condition can affect multiple body systems. Common symptoms include:
Dry Eyes (Xerophthalmia): Burning, stinging, or gritty sensation in the eyes, redness and irritation, sensitivity to light, blurred vision, eye fatigue, difficulty wearing contact lenses, and increased risk of eye infections.
Dry Mouth (Xerostomia): Difficulty swallowing or speaking, particularly when eating dry foods, sticky or thick saliva, altered sense of taste, difficulty wearing dentures, increased dental cavities and gum disease, mouth sores or infections, cracked lips, and dry, sore throat.
Other Dryness Symptoms: Dry nasal passages and frequent nosebleeds, dry skin and itching, vaginal dryness causing discomfort or pain during intercourse, and dry cough or throat irritation.
Musculoskeletal Symptoms: Joint pain and swelling, similar to rheumatoid arthritis, muscle pain and weakness, and fatigue, which is often severe and debilitating.
Systemic Symptoms: Swollen salivary glands, particularly the parotid glands in front of the ears, skin rashes or sun sensitivity, persistent dry cough or shortness of breath due to lung involvement, kidney problems affecting urine concentration, numbness or tingling in the hands and feet (peripheral neuropathy), digestive issues including acid reflux or difficulty swallowing, blood vessel inflammation (vasculitis), and lymph node swelling.
Complications: People with Sjögren's syndrome have a slightly increased risk of developing non-Hodgkin's lymphoma, particularly those with severely swollen salivary glands. Pregnancy complications may occur in women with certain antibodies (anti-Ro/SSA and anti-La/SSB). Dental problems including cavities and tooth loss are common due to reduced saliva production.
Diagnosing Sjögren's Syndrome
There is no single test to diagnose Sjögren's syndrome. Diagnosis involves a combination of clinical evaluation, blood tests, imaging, and specialized tests. A healthcare provider will review symptoms, particularly dryness complaints, and examine the eyes and mouth. Blood tests check for specific antibodies including anti-Ro/SSA and anti-La/SSB antibodies, which are present in many people with Sjögren's syndrome. Antinuclear antibodies (ANA) are often positive. Rheumatoid factor (RF) may be elevated. Inflammatory markers such as erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) may be elevated. Complete blood count may show anemia or low white blood cell count. Eye tests include the Schirmer test, which measures tear production using small strips of paper placed under the lower eyelids, and slit-lamp examination with special dyes to assess eye surface damage. Salivary gland tests measure saliva production through salivary flow rate testing. Salivary gland biopsy, typically of minor salivary glands in the lower lip, can confirm inflammation and immune cell infiltration. Imaging studies such as ultrasound or MRI of salivary glands can detect structural changes and inflammation.
Treatment Options
There is no cure for Sjögren's syndrome, but treatment focuses on relieving symptoms, preventing complications, and managing systemic manifestations. Treatment is individualized based on the severity and specific symptoms.
For Dry Eyes: Artificial tears or lubricating eye drops used frequently throughout the day, lubricating eye ointments at night, prescription medications such as cyclosporine (Restasis) or lifitegrast (Xiidra) that reduce inflammation and increase tear production, punctal plugs inserted into tear ducts to keep tears on the eye surface longer, moisture chamber glasses or goggles to reduce tear evaporation, and avoiding environments that worsen dryness such as wind, smoke, and air conditioning.
For Dry Mouth: Sugar-free gum or lozenges to stimulate saliva production, saliva substitutes and mouth moisturizers, prescription medications such as pilocarpine (Salagen) or cevimeline (Evoxac) that stimulate saliva production, frequent sips of water throughout the day, avoiding caffeine, alcohol, and tobacco which worsen dryness, meticulous dental hygiene including fluoride treatments and regular dental visits, and using a humidifier, especially at night.
For Joint Pain and Inflammation: Nonsteroidal anti-inflammatory drugs (NSAIDs) for mild joint pain, hydroxychloroquine (Plaquenil), an antimalarial drug that can help with joint pain, fatigue, and rashes, and corticosteroids for more severe inflammation, though used cautiously due to side effects.
For Systemic Symptoms: Immunosuppressive medications such as methotrexate, azathioprine, or mycophenolate mofetil for severe systemic involvement, biologic therapies including rituximab for severe cases affecting organs or blood vessels, and treatment of specific organ involvement such as lung disease or kidney problems with appropriate medications.
Lifestyle Modifications: Stay well-hydrated by drinking water frequently, use a humidifier at home and work, avoid irritants such as smoke, wind, and air conditioning, protect eyes with sunglasses outdoors, practice good oral hygiene and visit the dentist regularly, eat moist foods and avoid dry, spicy, or acidic foods that irritate the mouth, and manage fatigue through rest, pacing activities, and gentle exercise.
Living with Sjögren's Syndrome
Sjögren's syndrome is a chronic, lifelong condition that requires ongoing management. While there is no cure, most people with Sjögren's syndrome can manage their symptoms effectively and maintain a good quality of life with proper treatment. The condition varies greatly in severity, with some people experiencing only mild dryness symptoms and others facing significant systemic complications. Working closely with a rheumatologist and other specialists such as ophthalmologists and dentists is essential for comprehensive care. Regular monitoring helps detect and manage complications early. Adherence to treatment regimens, particularly for dryness management, is crucial for preventing damage to the eyes, teeth, and other affected areas. Staying informed about your condition, maintaining open communication with your healthcare team, and seeking support from family, friends, and support groups can help you successfully manage both the physical and emotional aspects of living with Sjögren's syndrome.