A sublingual salivary gland cyst is a rare and benign medical condition that typically develops in the mouth’s floor, beneath the tongue. These cysts are formed when the ducts of the sublingual salivary glands become blocked, preventing the normal flow of saliva and causing the gland to swell and form a fluid-filled sac. While the exact cause of these cysts is not always clear, they can result from various factors, including infections, trauma, or obstructions within the salivary ducts.