Sublingual cysts are cysts of the sublingual gland that, left untreated, can easily become infected and interfere with symptoms such as articulation and feeding. The sublingual gland forms a cyst when the duct is blocked due to trauma or other inflammatory infections, or when it is damaged and the glandular fluid extravasates and is retained. Sublingual gland cyst is a benign tumor, usually located in the sublingual region, with a thin, light blue, transparent blister-like wall, soft to touch, fluctuating, and requires surgical removal. If the cyst of sublingual gland is not treated, the cyst can be ruptured after trauma and discharge egg-white-like liquid, and the cyst will reappear after healing, which is recurrent and prone to secondary infections; with the prolongation of time, the cyst will increase in size, and lifting up of the tongue, it can also cause dyspnea and swallowing, and that space will be reduced, and the pronunciation will be altered. The appearance of sublingual gland cysts need to promptly seek medical treatment, develop a comprehensive surgical program to remove the sublingual gland.