Diagnosing Sjögren’s syndrome involves multiple tests and careful evaluation, as symptoms can mimic many other conditions and vary greatly from person to person.
Introduction: Who Should Seek Diagnostics
If you are experiencing persistent dryness in your eyes or mouth that does not improve with regular measures, it may be time to consult a healthcare provider. Sjögren’s syndrome is particularly worth investigating when dryness is accompanied by other symptoms such as joint pain, chronic fatigue, or swelling of the glands around your jaw and neck[1]. The condition most commonly affects women, with about nine out of ten diagnosed patients being female, though men and children can also develop it[2].
It is especially important to seek medical evaluation if you already have another autoimmune disease—a condition where the immune system attacks the body—such as rheumatoid arthritis or lupus. About half of all people with Sjögren’s syndrome have it alongside another autoimmune condition[2]. Even if your symptoms seem mild at first, early diagnosis matters because proper treatment can prevent serious complications such as tooth decay, vision problems, or damage to internal organs[2].
Most people are diagnosed between the ages of 45 and 55, though the disease can develop at any age[1]. If your eyes feel gritty, as though sand is in them, or your mouth feels like it is full of cotton, these are strong signals to contact your doctor[1][3].
Diagnostic Methods
Diagnosing Sjögren’s syndrome requires a combination of different tests because no single test can confirm the condition on its own. Your healthcare provider will begin with a detailed medical history and a physical examination, looking for signs such as dry mouth, dry eyes, or swollen salivary glands[7]. The doctor will also check for signs of other diseases that commonly occur with Sjögren’s syndrome, such as rheumatoid arthritis or lupus[7].
Blood Tests
Blood tests are a fundamental part of diagnosing Sjögren’s syndrome. Your doctor will order tests to look for specific antibodies—proteins made by the immune system—that are commonly found in people with this condition[8]. The most common antibodies tested are anti-SSA (also called Ro) and anti-SSB (also called La)[4][13]. A positive test for these antibodies strongly suggests Sjögren’s syndrome, though some patients test negative even when they have the disease[4].
Other blood tests may include checking for a positive anti-nuclear antibody (ANA), which indicates autoimmune activity, and rheumatoid factor (RF), another marker of immune system dysfunction[4][13]. Blood tests can also measure levels of different types of blood cells, check for signs of inflammation, and evaluate whether your liver or kidneys are functioning properly[8].
Eye Tests
Because dry eyes are one of the hallmark symptoms of Sjögren’s syndrome, eye examinations play an important role in diagnosis. One common test is the Schirmer tear test, where a small piece of filter paper is placed under your lower eyelid for about five minutes to measure how much moisture your eyes produce[8][18]. If your eyes produce very little moisture, this can indicate Sjögren’s syndrome.
An eye specialist, called an ophthalmologist, may also perform a slit lamp examination. During this test, special eye drops containing dye are placed in your eyes, and the doctor uses a magnifying device to examine the surface of your eyes for damage or dryness[8][18]. This helps determine how severely your eyes are affected and whether there is any damage to the cornea, the clear front part of your eye.
Saliva Tests
Tests that measure saliva production help doctors understand how well your salivary glands are working. One simple test involves spitting or allowing saliva to dribble into a container for five minutes to measure the total amount produced[6][14]. If you produce very little saliva, it may suggest that Sjögren’s syndrome is affecting your salivary glands.
Imaging Tests
Certain imaging tests can help evaluate the function and structure of your salivary glands. A sialogram is a special X-ray where dye is injected into the salivary glands in front of your ears, allowing doctors to see how much saliva flows into your mouth and whether the glands are blocked[8][18].
Another test called salivary scintigraphy is a nuclear medicine procedure where a small amount of radioactive material is injected into a vein. A special camera then tracks how quickly this substance reaches all of your salivary glands, providing information about their function[8][18].
In some cases, an ultrasound scan of the salivary glands may be performed. Ultrasound uses sound waves to create images and can show abnormalities in the gland structure that may suggest Sjögren’s syndrome[6][14].
Salivary Gland Biopsy
A lip biopsy is often considered one of the most definitive tests for Sjögren’s syndrome. During this procedure, a small sliver of tissue containing minor salivary glands is removed from the inside of your lower lip and examined under a microscope[8][18]. Doctors look for clusters of inflammatory cells, which indicate that the immune system is attacking the glands. This biopsy is particularly important when blood tests for antibodies are negative but symptoms strongly suggest Sjögren’s syndrome[4][13].
The biopsy is usually done under local anesthesia in an outpatient setting, meaning you can go home the same day. While it may sound intimidating, it is generally a safe and straightforward procedure.
Other Tests
Your doctor may also order a urine test to check kidney function or look for signs that Sjögren’s syndrome is affecting other organs[6][14]. Depending on your symptoms, additional specialized tests may be recommended to evaluate whether the disease has spread to your lungs, kidneys, nervous system, or other parts of your body.
Diagnostics for Clinical Trial Qualification
Clinical trials are research studies that test new treatments or medications for Sjögren’s syndrome. To participate in a clinical trial, patients usually need to meet specific criteria that are established through standardized diagnostic tests. These criteria help researchers ensure that all participants have similar disease characteristics, which makes the study results more reliable.
For enrollment in clinical trials, doctors typically require confirmation of Sjögren’s syndrome according to established classification criteria. The most widely used are the 2016 criteria, which require evidence of an immune process demonstrated either by positive antibodies to SS-A (Ro) or a positive salivary gland biopsy[10]. Some newer studies are also considering positive ultrasound findings as part of the diagnostic process[10].
Blood tests for specific antibodies are often mandatory for trial participation. The presence of anti-SSA (Ro) antibodies in the blood is one of the most important markers[10]. In patients who do not have these antibodies, a positive lip biopsy showing inflammatory cells in the salivary glands may be required instead[4][13].
Clinical trials may also use standardized questionnaires and scoring systems to measure the severity and impact of symptoms. These tools help researchers track whether the treatment being tested is effective. Common measures include assessments of dryness severity, pain levels, fatigue, and how much the disease affects daily activities[10].
In addition to confirming the diagnosis, clinical trials often perform additional tests to evaluate organ involvement or disease activity. These can include imaging studies, blood tests to measure inflammation, and tests of kidney or lung function, depending on the focus of the study. Some trials are specifically designed for patients with certain disease subtypes or those with involvement of particular organs[10].
If you are interested in participating in a clinical trial, your healthcare provider can help determine whether you meet the necessary diagnostic criteria. Clinical trials offer the opportunity to access new therapies that are not yet widely available, and they contribute to advancing knowledge about Sjögren’s syndrome for future patients[17].
