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 ...

The sinuses are hollow spaces in the skull and the face bones around your nose. There are four pairs of sinuses, named for the bones that they’re located in. The sinuses collectively are called the ...

Oral mucous cysts develop in the mouth. They appear near salivary gland openings, often on the lips or the floor of the mouth. A cyst on the floor of the mouth is known as a ranula. A cyst on the gums ...

An oral mucous cyst, also called a mucocele, is a harmless swollen spot. It's a good idea to get it checked out, though, especially if it's bothersome. There are two types. Mucoceles show up on the ...