A salivary gland stone is a hardened deposit made from minerals in saliva. It can form in a salivary gland or in the duct—the small channel that carries saliva into the mouth. When a stone narrows or blocks that channel, saliva backs up and the gland may swell or hurt, often when a meal makes the mouth produce more saliva.
Where do salivary gland stones occur?
The major salivary glands are paired glands near the jaw and ears and beneath the tongue. Stones are most common in the glands under the jaw, whose ducts open in the floor of the mouth. A stone may be visible or felt under the tongue, but many are deeper and cannot be seen at home. Some cause no symptoms until they obstruct flow.
This is a blockage problem, not a stone in a tooth. It is also different from general dry mouth: a stone may cause a one-sided or meal-linked flare even when saliva production elsewhere is normal.
What does a blockage feel like?
The characteristic pattern is swelling or discomfort over the affected gland that begins or worsens during eating, then eases as the meal ends or saliva finds a path around the obstruction. A person may notice a lump under the tongue or jaw, a bad taste, or a temporary gush of saliva. Symptoms can come and go because the stone shifts, the duct partially opens, or saliva production changes.
Not every meal-related swelling is a stone. Infection, a different salivary-duct problem, or another lump can produce overlapping symptoms. A persistent or enlarging lump should be examined rather than explained by a presumed stone.
Why does eating trigger pain?
Smelling, tasting, and chewing food stimulate saliva. Normally that fluid travels through the duct into the mouth. A stone acts like a plug: pressure builds behind it, stretching the gland and surrounding tissues. Once flow decreases or resumes, the pressure can settle. This explains the timing, but the pattern does not prove the diagnosis by itself.
Dehydration and medicines that reduce saliva can promote stasis in some people, but many stones have no single clear cause. Do not stop a prescribed medicine to prevent a stone without discussing it with the prescriber.
How is a salivary stone evaluated?
A clinician asks about timing, meal triggers, recurrence, fever, bad taste, and medical history, then examines the mouth, floor of the mouth, jaw, and gland. A stone near a duct opening may be felt with a careful examination. Ultrasound or CT can help when the stone is deeper or the diagnosis is uncertain; the choice depends on the location and clinical findings.
The purpose of evaluation is to confirm whether a duct is blocked, check for infection, and understand the stone’s location and size. A dental, medical, ear-nose-and-throat, or oral-and-maxillofacial clinician may be involved depending on the finding.
What can you do safely while arranging care?
Drink water and keep the mouth comfortable. Gentle massage around the gland or sugar-free gum may encourage saliva flow for some people, but stop if it increases pain. Never probe under the tongue with a needle, tweezers, or another sharp object; that can injure the duct and introduce infection. Do not assume repeated swelling should be managed indefinitely at home.
Small stones sometimes pass on their own. Others need a clinician to help them out, use a minimally invasive procedure such as sialendoscopy, or choose another treatment based on location. Antibiotics are used when a clinician identifies infection; they are not a way to dissolve every stone.
When is prompt care important?
Contact a clinician for swelling or pain that keeps returning, a stone that does not pass, or symptoms that interfere with eating. Fever, redness, pus, worsening tenderness, or feeling acutely unwell can signal infection and deserves prompt assessment. Rapidly increasing swelling, trouble swallowing, or trouble breathing is urgent.
The main idea
A salivary gland stone is a mineral deposit that can obstruct saliva flow. Meal-related swelling or pain is a useful clue because meals stimulate saliva, but only an examination can sort a stone from other causes. Safe hydration and gentle comfort measures may help while arranging care; sharp self-removal and prolonged watchful waiting are unsafe.
Sources
- Salivary Stones — MSD Manual Professional Edition
- Salivary Gland Stones — NHS
- Salivary Gland Pathology — NHS Greater Glasgow and Clyde