Salivary stones, also known as sialoliths, are hard mineral deposits that form in the salivary glands. These stones can block the flow of saliva, leading to swelling, pain, and infection in the affected gland. They are most commonly found in the submandibular gland, which is located beneath the jaw. The exact cause of salivary stones is not always clear, but factors like dehydration, reduced saliva flow, and certain medications can contribute to their formation. Treatment options may include hydration, massage of the gland, or in some cases, surgical removal of the stone to restore normal saliva flow.