Mucous cysts are pseudocysts (cystic structures lacking a true lining) that usually appear on the middle or index finger of the dominant hand; toe involvement is uncommon. Although most mucous cysts ...

Mucous cysts develop when salivary glands become plugged. They’re usually temporary, but if left untreated, they can become permanent. A mucous cyst, also known as a mucocele, is a fluid-filled ...