Mucous gland cysts are common diseases of the oral mucosa and are superficial cysts formed by the retention of secretion after obstruction of small salivary gland ducts. It is mainly caused by minor trauma to the salivary gland duct rupture; salivary protein overflow into the tissue, followed by possible mucus gland duct obstruction; mucus retention to expand the gland duct, often occurring in the lip mucosa, followed by the buccal mucosa, tongue ventral mucosa, and more common in the lower lip. Clinical manifestations of mucous gland cysts are located in the submucosa, about the size of a soybean, in the form of translucent painless small blisters. After rupture, mucus can flow out and the swelling subsides, but it can recur soon. After multiple recurrences, the cyst surface is often grayish white due to scarring. Etiology In the submucosa of the oral cavity, there are hundreds of small salivary glands that secrete colorless mucus, called mucus glands, with the most distribution on the lower lip, soft palate, and ventral surface of the tongue. Their excretory ducts open in the oral cavity, and due to trauma to the excretory ducts, mucus leaks out and forms cysts. They are most often found on the lower lip and occur in people with lip biting habits. The cyst is located in the submucosa and is a translucent vesicle with a normal mucous membrane covering the surface. After a few days of appearance, the cyst membrane may rupture and disappear due to friction with food, etc., but it may appear again soon, and after several recurrences, the mucous membrane produces scar tissue, which turns the translucent vesicles into white hard nodules. Mucous gland cyst treatment Early detection can be observed to avoid squeezing, some cysts can subside on their own without treatment; if they cannot subside, surgical excision is the main means to remove the cyst and the small glands in the surrounding surgical area together, but the ducts of the surrounding glands may still be blocked during suturing to form cysts again, so the surgery has a certain percentage of recurrence rate, some data report a recurrence rate of about 10%, according to my For patients who are unwilling to operate or unable to cooperate with surgery (mainly children), the cyst can be extracted by injecting 2% tincture of iodine or anhydrous alcohol into the cystic cavity for 2-3 min and then extracting it to make the cystic wall fibrotic.