Sjögren's Syndrome: The Autoimmune Disease Behind Chronic Dry Eyes and Fatigue

Sjögren's syndrome is a chronic autoimmune disease in which the immune system attacks the glands that make tears and saliva, causing the hallmark triad of dry eyes, dry mouth, and fatigue. It is one of the most common autoimmune diseases, affecting an estimated 1 to 4 million people in the United States, and about 90% of those diagnosed are women. It is a distinct condition from lupus, and while there is no cure, the symptoms are very treatable.

Key Takeaways

• Sjögren's (pronounced "SHOW-grins") attacks moisture-making glands, so the classic signs are dry eyes, dry mouth, and lasting fatigue.
• Fatigue is a core feature, not a side note: it affects roughly 70 to 80% of patients.
• Diagnosis combines symptoms with specific blood tests (anti-Ro/SSA), a tear-production test, and sometimes a small lip biopsy.
• Sjögren's is a separate disease from lupus, though the two can overlap and share some antibodies.
• There is no cure, but eye drops, saliva-boosting medicines, and systemic drugs manage symptoms well.

What Sjögren's syndrome is

In an autoimmune disease, the immune system mistakes healthy tissue for a threat and attacks it. In Sjögren's, the target is your exocrine glands, the glands that produce moisture. When the tear glands and salivary glands come under attack, they make less fluid. That is why the two most recognized signs are keratoconjunctivitis sicca (the medical term for chronic dry eyes) and xerostomia (chronic dry mouth), according to the National Library of Medicine.

Dry eyes often feel gritty, sandy, or burning, as if something is stuck in the eye. Dry mouth can make it hard to swallow dry foods or speak for long without sipping water. But Sjögren's is a whole-body disease, not just a dryness problem. It can also affect the joints, lungs, kidneys, and nerves.

Why the fatigue is so heavy

Many people are surprised that a "dry eye" condition leaves them exhausted. The fatigue in Sjögren's is real and often disabling. It affects about 70 to 80% of patients and can be as limiting as the dryness itself. The reason is that immune activation is happening throughout the body, not only in the glands. If you have unexplained, persistent tiredness alongside dry eyes and dry mouth, that combination is worth mentioning to your clinician.

Sjögren's is not lupus

Sjögren's and lupus are both autoimmune diseases, and they can look alike or even occur together, which is why they are sometimes confused. But they are distinct conditions that behave differently:

• Main symptoms differ. Sjögren's centers on dry eyes and dry mouth. Lupus more often causes photosensitive skin rashes and inflammation in organs like the kidneys.
• Antibody patterns differ. Anti-SSA (also called anti-Ro) is far more central to Sjögren's.
• Cancer risk differs. Sjögren's carries a notably higher risk of lymphoma, a type of blood cancer, than lupus does. Both conditions raise lymphoma risk above average, but the increase is greatest in Sjögren's, which is why ongoing monitoring matters.
• Overlap is common. A meaningful share of lupus patients also develop Sjögren's, which is part of why the line between them can blur.

If you are trying to sort out which condition you may have, our guide to the early signs of lupus is a helpful companion read. A rheumatologist can look at your full picture and tell the two apart.

Who tends to get it

Sjögren's affects women far more than men: about 90% of cases occur in women, and most people are diagnosed after their forties. That said, it can appear at any age, and men get it too. The typical age range at diagnosis is around 40 to 60, per the Mayo Clinic.

How Sjögren's is diagnosed

No single test confirms Sjögren's. Instead, your rheumatologist weighs several results together, along with your symptoms:

• Blood tests for autoantibodies. A positive anti-Ro/SSA result (and sometimes anti-La/SSB) is highly suggestive of Sjögren's.
• Schirmer test. This measures how much your eyes tear. A small paper strip is tucked under the lower eyelid; 5 mm or less of wetting in 5 minutes points to dryness.
• Salivary gland biopsy. When the picture is unclear, a tiny sample from the inner lip can show the clusters of immune cells that signal Sjögren's.

Because the signs overlap with other conditions, getting evaluated by a specialist matters. You can learn more about care at Morningside Medical on our rheumatology services page.

How Sjögren's is managed

There is no cure for Sjögren's, but most people manage well with treatment matched to their symptoms:

• For dry eyes: artificial tears and prescription eye drops.
• For dry mouth: saliva substitutes and medicines that stimulate saliva flow, such as pilocarpine and cevimeline.
• For whole-body disease: systemic medicines. Hydroxychloroquine, an antimalarial drug also used in lupus, can help joint and fatigue symptoms, and in severe cases a drug called rituximab may be used.

Small daily habits help too: sipping water often, using a humidifier, protecting your eyes from wind and screens, and staying on top of dental care, since dry mouth raises the risk of cavities.

When to seek care

Most Sjögren's symptoms are managed in routine visits, but some warning signs deserve prompt attention:

• Painless, lasting swelling of the glands near your jaw or neck, or of lymph nodes, plus unexplained weight loss, night sweats, or ongoing fever. These can be warning signs of lymphoma. In Sjögren's the risk is estimated at 6.5 to 44 times higher than average, typically developing a median of about 7.5 years after diagnosis, which is why ongoing monitoring matters.
• Sudden vision changes, severe eye pain, or strong light sensitivity. Untreated severe dry eye can damage the cornea, so seek eye care.
• New numbness, tingling, weakness, or shortness of breath. These may signal nerve, lung, or kidney involvement. Nerve complications are recognized enough that the American College of Rheumatology issued a practice guideline specifically for them, and they call for a specialist's assessment.

The bottom line

If you live with dry eyes, dry mouth, and fatigue that will not lift, those are not three separate annoyances. Together they can point to one treatable autoimmune disease. A rheumatologist can run the right tests, tell Sjögren's apart from lupus, and build a plan that fits your body.

This article is for general information and is not a substitute for professional medical advice. Talk to your clinician about your specific situation.

Ready to get answers? Book an appointment with Morningside Medical.