Salivary Glands: Function, Location, and Common Disorders

Salivary glands produce saliva, which helps keep the mouth moist, supports digestion, and protects teeth and oral tissues. The major salivary glands are located near the ears, beneath the jaw, and under the tongue, while smaller glands are distributed throughout the mouth.

Healthy salivary gland function supports comfortable chewing and swallowing, helps maintain the balance of the oral environment, and contributes to tooth protection. Problems may affect saliva production or flow and can cause symptoms such as dry mouth, swelling, or discomfort, depending on the underlying cause. Understanding the glands' location, function, and common disorders can help readers recognize when professional evaluation may be needed.

What Are Salivary Glands?

Salivary glands are exocrine glands located throughout the mouth and neck. They produce and release saliva into the oral cavity. They work continuously, though production can increase in response to eating, smelling food, or certain other triggers.

Where Are the Salivary Glands Located?

The salivary glands are located in several areas around the mouth and jaw. Major sites include just in front of the ears, beneath the jawbone, and under the tongue. Smaller glands are scattered throughout the lining of the mouth and lips.

What Are the Major Salivary Glands?

There are three pairs of major salivary glands. Each pair is positioned in a different area of the mouth and jaw, and each contributes a distinct proportion of the saliva produced throughout the day.

Parotid Glands

The parotid glands are the largest of the salivary glands. They sit just in front of and slightly below each ear. They primarily produce a watery type of saliva and are the glands most commonly affected by mumps and certain infections.

Submandibular Glands

The submandibular glands sit beneath the jawbone. They produce a mixture of watery and thicker saliva. Along with the other salivary glands, they are responsible for a significant portion of daily saliva output, particularly during rest.

Sublingual Glands

The sublingual glands are the smallest of the three major pairs of salivary glands. They are located under the tongue and mainly produce thicker, mucus-rich saliva that helps lubricate the mouth.

What Is the Function of Salivary Glands?

Salivary glands produce saliva, which supports digestion, keeps oral tissues moist, and helps protect teeth. Saliva also helps maintain a balanced oral environment by clearing food debris and neutralizing acids.

How Saliva Supports Oral Health

Saliva helps wash away food particles and neutralize acids produced by oral bacteria. It also contains minerals that support the natural repair of early enamel damage. When saliva production decreases, the risk of tooth decay, oral discomfort, and difficulty swallowing may increase.

How Saliva Helps With Digestion

Saliva moistens food, making it easier to chew and swallow. It also contains enzymes, including amylase, that begin breaking down starches during digestion.

How Saliva Protects Teeth and Gums

Saliva helps protect teeth by buffering acids and supplying minerals that support enamel. It also helps keep the mouth comfortable and supports the tissues lining the oral cavity. Reduced saliva flow can increase the risk of cavities and other oral health problems.

Adequate hydration and regular dental care can support oral health, but persistent dry mouth may require evaluation to identify its underlying cause.

Note: All images used are for editorial and illustrative purposes only and may not originate from the original news provider or associated company.

What Disorders Affect the Salivary Glands?

Disorders affecting the salivary glands include a range of conditions that affect the structure or function of the glands. These range from temporary inflammation to more complex issues requiring ongoing management.

Inflammatory Salivary Gland Disorders

Inflammatory salivary gland disorders often result from infection or irritation. This can lead to swelling, tenderness, and sometimes changes in the amount or consistency of saliva produced.

Obstructive Disorders of the Salivary Glands

Obstructive salivary gland disorders occur when something, such as a stone or narrowed duct, prevents saliva from draining properly. This often results in recurring swelling that worsens with eating.

Autoimmune-Related Salivary Gland Problems

Autoimmune-related salivary gland problems occur when the body's immune system mistakenly affects the gland tissue. This can reduce saliva production and contribute to persistent dryness in the mouth.

Salivary Gland Cysts

Salivary gland cysts are fluid-filled sacs that can develop within or near the gland tissue. They sometimes form after injury, blockage, or chronic inflammation.

Salivary Gland Tumors

Salivary gland tumors can be either non-cancerous or cancerous. While most are benign, any new or persistent lump should be evaluated promptly to determine its nature.

What Are Common Salivary Gland Problems?

Salivary gland disorders can affect saliva production, the flow of saliva through the ducts, or the structure of the glands themselves. Symptoms vary depending on the underlying condition, and similar symptoms may have different causes.

Salivary Gland Swelling and Inflammation

Swelling near the ear, beneath the jaw, or under the tongue may occur when a salivary gland becomes inflamed or its duct is blocked. Infection is one possible cause. Persistent or recurrent swelling should be assessed by a healthcare professional to determine the cause.

Learn more about sialadenitis, a condition involving inflammation of the salivary glands.

Salivary Gland Stones and Blocked Ducts

Salivary stones are hardened mineral deposits that can obstruct the ducts carrying saliva into the mouth. Symptoms may include swelling or pain that becomes more noticeable during meals, when saliva production increases. Other forms of duct narrowing or obstruction can cause similar symptoms.

Read more about salivary gland stones to understand their causes, symptoms, and treatment options.

Dry Mouth and Reduced Saliva Production

Dry mouth can occur when the salivary glands produce too little saliva or when saliva does not adequately moisten the mouth. Possible causes include dehydration, medication side effects, and certain medical conditions. Persistent dryness can affect chewing, swallowing, and the risk of tooth decay.

Autoimmune and Other Salivary Gland Disorders

Some autoimmune conditions, including Sjögren's disease, can affect salivary gland function and contribute to chronic dry mouth. Cysts and tumors can also develop in or near salivary gland tissue. A persistent lump, unexplained enlargement, or ongoing symptoms should be professionally evaluated rather than assumed to be a simple infection or blockage.

The appropriate assessment and treatment depend on the suspected cause and the findings of the clinical examination.

What Is a Salivary Gland Infection?

A salivary gland infection occurs when bacteria, or less often a virus, affects one of the salivary glands. This typically results in swelling, tenderness, and discomfort in the affected area.

Common Symptoms of a Salivary Gland Infection

Common symptoms of a salivary gland infection include swelling, pain, and redness over the affected area. Other signs can include a bad taste in the mouth and sometimes fever or difficulty opening the mouth fully.

What Causes a Salivary Gland Infection?

A salivary gland infection is often caused by reduced saliva flow, which allows bacteria to accumulate and multiply within the duct. Blockages from stones can also contribute to infection risk.

Can a Salivary Gland Infection Cause Swelling?

Yes, a salivary gland infection can cause swelling. The body's inflammatory response to bacteria or viruses often leads to fluid buildup and visible enlargement of the affected gland.

How Is a Salivary Gland Infection Diagnosed?

A salivary gland infection is diagnosed through a physical examination and a review of symptoms. Imaging is sometimes added to help confirm the presence of infection and rule out other possible causes.

How Are Salivary Gland Infections Treated?

Salivary gland infections are typically treated with antibiotics when bacterial. Supportive measures such as hydration and gentle massage also help encourage saliva flow and reduce swelling.

Tips for Patients

Seek professional dental or medical assessment if swelling is accompanied by significant pain, fever, pus, or difficulty swallowing. The same applies if symptoms are getting worse.

How Are Problems in the Salivary Glands Diagnosed?

Diagnosing problems affecting the salivary glands typically involves a combination of physical examination and symptom review. Imaging is added when a more detailed look at the gland or duct is needed.

Oral and Physical Examination

An oral and physical examination allows a dentist to check for swelling, tenderness, and any visible changes in the glands or surrounding tissue. This exam also includes assessing saliva flow.

Reviewing Symptoms and Medical History

Reviewing symptoms and medical history includes asking about the timing and triggers of symptoms. It also involves asking about any underlying medical conditions that could be affecting gland function.

Imaging Tests for the Salivary Glands

Imaging tests for disorders affecting the salivary glands can help confirm a diagnosis when the cause is not clear from examination alone. These tests allow a closer look at the gland structure and any blockages.

Ultrasound

Ultrasound is often the first imaging option used. It can identify stones, blockages, and swelling without exposing the patient to radiation.

CT Scan

A CT scan can provide more detailed images of the gland and surrounding structures. This is particularly useful for identifying smaller stones or assessing more complex cases.

MRI

An MRI may be used when soft tissue detail is especially important. This includes evaluating a suspected tumor or assessing the extent of a more complex condition.

Additional Tests When Needed

Additional tests when needed may include a saliva sample analysis. In select cases, a small tissue sample may be taken to rule out more serious underlying conditions.

How Are Disorders of the Salivary Glands Treated?

Treatment for disorders affecting the salivary glands depends entirely on the underlying cause. Infections, stones, and autoimmune-related conditions each require a different treatment approach.

Treatment for Salivary Gland Infections

Treatment for salivary gland infections often includes antibiotics for bacterial causes. Hydration, warm compresses, and gentle massage also help encourage normal saliva flow.

Treatment for Stones and Salivary Gland Blockages

Treatment for salivary gland stones and blockages may involve hydration and massage for smaller stones. Larger or persistent stones sometimes require a minor procedure to remove them.

Managing Dry Mouth and Reduced Saliva

Managing dry mouth and reduced saliva can involve staying well hydrated and using saliva substitutes when recommended. It also involves addressing any underlying medical condition contributing to reduced gland function.

When a Procedure or Surgery May Be Needed

A procedure or surgery may be needed when stones cannot be resolved through conservative measures. Surgery may also be needed when a cyst or tumor requires removal for diagnosis or treatment.

When Should You See a Dentist About the Salivary Glands?

Arrange a professional evaluation if you notice persistent or recurring swelling near the ears, jaw, or under the tongue; ongoing dry mouth; unexplained lumps; or pain that interferes with eating. Symptoms that worsen or fail to improve also deserve assessment.

Seek prompt medical attention if swelling is accompanied by fever, redness, pus, or increasing pain, as these may indicate an infection.

Difficulty breathing or swallowing, particularly with rapidly increasing swelling of the face or neck, requires emergency medical care. Do not rely on home remedies when symptoms are severe or rapidly worsening.

Vitrin Clinic: How Can We Help With Salivary Glands and Oral Health?

Vitrin Clinic evaluates symptoms related to the salivary glands as part of a broader assessment of oral health. Gland-related concerns often connect to overall dental and soft tissue health.

Comprehensive Oral Evaluation at Vitrin Clinic

A comprehensive oral evaluation at Vitrin Clinic includes examining the mouth, gums, and surrounding tissue. The exam looks for signs of swelling, tenderness, or other changes that may relate to gland function.

Identifying Oral Symptoms Linked to the Salivary Glands

Identifying oral symptoms linked to salivary gland problems helps determine whether findings are consistent with an infection, blockage, or another condition. This step guides whether further attention is needed.

Personalized Dental Care at Vitrin Clinic

Personalized dental care at Vitrin Clinic is based on each patient's specific symptoms and examination findings. It does not apply a single approach to every case.

What We Notice Clinically

Dr. Rifat Alsaman, Head of the Medical team at Vitrin Clinic and a cosmetics dentist, emphasizes that treatment should be based on the cause of the salivary gland problem. Treating swelling or pain alone is not enough.

Dr. Rifat Alsaman's Clinical Perspective

Dr. Rifat Alsaman, Head of the Medical team at Vitrin Clinic and a cosmetics dentist, highlights the importance of evaluating persistent oral symptoms as part of comprehensive dental care. At Vitrin Clinic, patients can receive personalized assessment and appropriate guidance based on their oral health needs.

Tips for Patients

If salivary gland symptoms are persistent or affecting eating, speaking, swallowing, or daily comfort, Vitrin Clinic can provide an oral health assessment. This assessment helps determine the appropriate next step.

Resource

https://pmc.ncbi.nlm.nih.gov/articles/PMC6769486/ 

https://pmc.ncbi.nlm.nih.gov/articles/PMC9935576/ 

https://pmc.ncbi.nlm.nih.gov/articles/PMC11723892/