The skin on the back of the neck by the hairline comes into contact ... under the skin that contains the protein keratin. These cysts can grow very large. Most are painless, but if they become ...

A hump on the back of the neck, or top of the spine, can have various causes. These causes may include kyphosis, osteoporosis, muscle knots, and cysts. A person may refer to the hump on the back ...

Serena Williams is sharing a recent health scare — having a benign branchial cyst "the size of a small grapefruit" removed from her neck. The retired tennis legend, who is 43, took to social ...

Cysts that are higher up on the spine can affect your upper back, neck, hands, and arms. Some people develop numbness in their skin. Others report a tingling or prickling sensation. Many of these ...

Branchial cleft cysts are small sacs filled with fluid that look like lumps under the skin on the side of the neck, according to the Cleveland Clinic. They can appear at any age, though they are ...