What Is a Subchondral Bone Cyst? It's a fluid-filled sac that forms in one or both of the bones that make up a joint. They're especially common at the knee or hip. The cysts show up just under the ...

Ovarian cysts are sacs or pockets of fluid that form on the ovaries. There are two types of cysts: simple and complex. These are fluid-filled cysts that have no solid features. They are often either a ...

Around one in 10 women will develop ovarian cysts at some point during their lives, and while the prospect of a cyst growing on your ovaries could set off alarm bells, they aren’t something you need ...

A pilar cyst, sometimes called a trichilemmal cyst, forms when a hair follicle gets clogged. They can happen anywhere on your body but are most common on the scalp. Pilar cysts can be irritating but ...

A cyst is a closed pocket of tissue that can be filled with fluid, air, pus or other material. Cysts can form in any tissue in the body and the majority are noncancerous (benign). Depending on type ...

Ingrown hairs in the pubic area can form cysts, or sacs of fluid beneath the skin. A person may notice a lump, possibly with a hair visible beneath it. Cysts often go away without treatment, but some ...