Salivary stones, also known as sialoliths, are hard mineral deposits that form in the salivary glands. They can block the flow of saliva, leading to swelling, pain, and infection. The most commonly affected gland is the submandibular gland, located beneath the jaw. These stones can vary in size and may be composed of calcium, phosphate, or other minerals. Symptoms often include dry mouth, difficulty swallowing, and a bad taste in the mouth. Treatment options range from hydration and massage to surgical removal in more severe cases.