Sublingual gland cysts do not heal on their own and can affect breathing, chewing, and pronunciation if left untreated. Sublingual gland cyst is a cyst formed by fluid retention due to obstruction or breakage of the duct. Sublingual gland cysts mainly manifest as painless lumps, soft texture, asymptomatic, the surface may be light blue, located on the side of the floor of the mouth, and decrease in size after breakage, and can be recurrent . Sublingual gland cyst is a common benign tumor, usually does not cause much harm to the body, but with the enlargement of the cyst, there will be difficulty in chewing, affecting the pronunciation, and severe enlargement will also affect breathing. Sublingual gland cysts are usually treated with surgery to remove the sublingual gland, which has a high cure rate and a good prognosis, but some of them may recur. It is recommended to consult a doctor in time and perform surgery as soon as possible after diagnosis to avoid adverse effects.