Dry Mouth and Autoimmune Conditions Beyond Sjögren’s: Rheumatoid Arthritis, Lupus & Type 1 Diabetes

Xerostomia, also known as dry mouth, is a common and often debilitating condition that affects about 20% of the global population. Sjögren’s syndrome is the autoimmune disorder most commonly associated with dry mouth (and dry eyes), but many other autoimmune conditions can also trigger reduced saliva production. 

 

In this blog post, we’ll explore xerostomia in the context of autoimmune diseases beyond Sjögren’s, focusing on rheumatoid arthritis (RA), systemic lupus erythematosus (SLE or lupus), and Type 1 diabetes.

 

Understanding the relationship between autoimmune conditions and dry mouth is important when making informed choices regarding the treatment options available to you. Fortunately, there are many effective options available, including the SaliPen and prescription medications. We’ll also discuss how these options fit into the bigger picture of living with an autoimmune disease.

 

Why Do Autoimmune Diseases Cause Dry Mouth?

Xerostomia is caused when the salivary glands malfunction and don’t produce enough saliva, a substance critical for lubricating the mouth, aiding digestion, protecting teeth from decay, and maintaining oral health. 

 

When someone has an autoimmune disease, the immune system mistakenly attacks healthy tissues; in some cases, this includes the salivary glands. This can lead to inflammation, fibrosis, and/or reduced gland function, all of which impact saliva production. 

 

Even without a direct gland attack, many medications used to treat autoimmune systems cause xerostomia as a side effect, indirectly contributing to salivary gland malfunction. 

 

Xerostomia Beyond Sjögren’s

Sjögren’s syndrome is arguably the autoimmune disease most commonly associated with xerostomia, occurring either as primary Sjögren’s (standalone) or secondary Sjögren’s (overlapping with another autoimmune disease). We’ve written about Sjögren’s and dry mouth previously; now, we’ll focus on the autoimmune diseases that typically receive less attention vis a vis dry mouth.  

 

Dry Mouth and Rheumatoid Arthritis (RA)

Rheumatoid arthritis is a chronic inflammatory autoimmune disease that causes pain and swelling in the joints; it also negatively affects oral health, including decreased salivary pH and salivary flow rates.

 

In some cases, standalone RA is enough to cause xerostomia, either through its direct effects on the salivary glands or through medications taken to control RA that lead to dry mouth as a side effect. 

 

In other cases, xerostomia stems from secondary Sjögren’s syndrome, which is common in people with RA. Estimates vary, though one commonly cited study points to a 30% prevalence of Sjögren’s syndrome in patients with RA. In these cases, Sjögren’s itself can cause dry mouth, as can the combination of two autoimmune diseases that negatively impact salivary gland function.

 

Xerostomia symptoms span a wide range, including difficulty chewing, swallowing, talking, frequent sleep disruptions, altered taste, and more. This is why screening for dry mouth is recommended as part of comprehensive RA management; once diagnosed, patients can seek relief. 

 

Dry Mouth and Systemic Lupus Erythematosus (Lupus)

Systemic lupus erythematosus (SLE) is a multisystem autoimmune disease that causes widespread inflammation and damage to multiple organs, including the oral cavity. 

 

Oral manifestations are common in lupus; in fact, they’re often the first noticeable symptoms of the condition, which is why early dental screenings are vital, as oral signs may appear before full systemic diagnosis.

 

One study found that 75% of patients with SLE have xerostomia, which is often accompanied by other oral issues like ulcers, mucosal pain, burning tongue, or cheilitis. Xerostomia can exacerbate discomfort during flare-ups and increase the risks of oral infections or candidiasis. 

 

Like RA, SLE can cause xerostomia by itself or when it occurs with secondary Sjögren’s syndrome. On its own, SLE directly affects the salivary glands or mucosal tissues, leading to inflammation and reduced saliva production. Xerostomia may also stem from the medications taken to control SLE, which list dry mouth as a side effect. 

 

When patients have SLE and secondary Sjögren’s syndrome together, the risks of xerostomia increase. The prevalence of people with lupus and Sjögren’s syndrome ranges from 14% to 17.8%.

 

Dry Mouth and Type 1 Diabetes

Unlike Type 2 diabetes, which is considered a metabolic disorder, Type 1 diabetes (T1D) is an autoimmune disease in which the immune system attacks and destroys insulin-producing beta cells in the pancreas, leading to lifelong insulin dependence. While T1D is mainly known for its effects on blood sugar regulation, it also frequently impacts oral health, including salivary gland function.

 

Research consistently shows that people with T1D experience dry mouth more often than those without diabetes. Studies have shown a wide range of T1D and xerostomia presenting together: all the way from 12.5% to 76.4%. 

 

Unlike RA and SLE, where secondary Sjögren’s syndrome often plays a major role, xerostomia in T1D is more commonly driven by:

• High blood glucose levels, which can directly damage salivary glands over time and alter saliva composition.
• Diabetic neuropathy (nerve damage), which affects the nerves that regulate salivary gland function. 
• Dehydration from frequent urination and other systemic effects of uncontrolled diabetes.

 

Similar to RA and SLE, medications used in diabetes management or for related conditions may cause xerostomia as a side effect. 

 

While good glycemic control can help mitigate salivary dysfunction, people with T1D should schedule regular dental checkups, as xerostomia often first appears as oral health issues. The earlier the symptoms are detected, the more effective management can be. 

 

Other Autoimmune Conditions Linked to Dry Mouth

In addition to RA, SLE, and T1D, other autoimmune diseases are associated with xerostomia:

• Systemic sclerosis (SSc): Fibrosis and vascular changes can impair salivary glands, often overlapping with Sjögren’s-like symptoms. Xerostomia presents in up to 80% of patients with SSc.
• Autoimmune thyroid diseases: Thyroid autoimmunity can indirectly affect salivary function. Approximately 50% of people diagnosed with xerostomia have thyroid disease. 

 

Xerostomia Symptoms

“Dry mouth” may sound like a harmless, perhaps minor, uncomfortable condition, but its symptoms can have a wide-reaching impact on daily activities and overall health. Dry mouth is far more than just a dry mouth; symptoms include:  

 

• Difficulty eating, chewing, and speaking
• Difficulty wearing dentures
• Increased tooth decay, gum disease, and oral infections
• Altered taste or lack of taste
• Halitosis
• Sleep disruptions due to frequent thirst
• Reduced quality of life, especially when compounded by joint pain, fatigue, or other autoimmune symptoms

 

For those with autoimmune conditions, addressing dry mouth early can prevent complications and improve daily functioning.

 

Dry Mouth Treatments in Autoimmune Contexts

There is no cure for xerostomia, just as there are no cures for autoimmune diseases. There are, however, treatment and management options for both. 

 

For xerostomia that results from autoimmune diseases, the more the autoimmune disease is under control, the less severe the xerostomia symptoms will be. However, due to the nature of autoimmune diseases, even the best management strategies may not be able to completely eliminate xerostomia symptoms.

 

In these cases, there are two main options: medications and electrostimulation via the SaliPen.

 

Several medications are designed to pharmacologically stimulate the salivary glands to produce more saliva – but they may come with unpleasant to downright painful side effects, such as headaches, dizziness, upset stomach, irregular heartbeat, and more. Additionally, dry mouth  medication may be contraindicated with other medications taken to manage your autoimmune disease; always consult with a healthcare professional regarding medication or treatment combinations.

 

The SaliPen stimulates the salivary glands without pharmacological side effects; it’s a small handheld device that goes in your mouth and delivers painless electrical impulses to the salivary glands to stimulate saliva production. This option has no side effects.

 

Many comprehensive dry mouth treatment plans include several tactics together, such as medication, electrostimulation, and lifestyle adjustments. 

 

The following lifestyle adjustments won’t cure dry mouth, but they can significantly lessen symptoms:

 

• Staying hydrated and drinking water frequently
• Using sugar-free gum or lozenges to stimulate saliva production
• Avoiding caffeine, alcohol, and excessively spicy, salty,and sugary foods
• Using over-the-counter saliva substitutes or moisturizing gels to provide temporary relief from dryness
• Maintaining excellent oral hygiene with fluoride products
• Sleeping with a humidifier to keep moisture in the air at night (when saliva production naturally decreases)

 

Xerostomia significantly impacts daily activities such as eating and talking, so achieving the best possible treatment is important for a high quality of life. 

 

This is especially true for people managing autoimmune conditions like rheumatoid arthritis, lupus, or type 1 diabetes. By combining effective treatments with consistent lifestyle habits – along with close collaboration of healthcare providers –  you can better protect your oral health, reduce complications, and reclaim comfort in everyday activities.

 

FAQs

Is dry mouth always a sign of an autoimmune disease?

No. While dry mouth is common in people with various autoimmune diseases, it can also be the result of other things, such as injury to the head and neck region, cancer treatments for head and neck cancer, medication side effects, and more. 

 

Will treating my autoimmune disease help treat my dry mouth too?

It’s possible that treating your autoimmune disease will lessen dry mouth symptoms, but it’s not guaranteed. If dry mouth persists despite treatments for your autoimmune disease, seek out xerostomia-specific treatments such as the SaliPen or medications.

 

What are the risks of ignoring chronic dry mouth in autoimmune diseases?

Untreated xerostomia isn’t fatal, but it certainly lowers quality of life. Xerostomia increases the risks for rapid tooth decay, oral infections, gum disease, difficulty eating/swallowing, and even sleeping.

 

Are there non-medication ways to stimulate saliva in autoimmune-related dry mouth?

Yes. The SaliPen is a non-medication treatment option that stimulates saliva production via painless electrical impulses to the oral cavity. Lifestyle adjustments that should be used in conjunction with the SaliPen include hydration, chewing sugar-free gum, cutting down on caffeine, alcohol, and nicotine.