If you have an unidentified growth somewhere on your body, it’s difficult not to worry.

These two types of lumps are different, however.

A cyst is usually a small, fluid-filled sac that appears on your body.

Wrist with a cyst

Meanwhile, a tumor is any area with abnormal tissues growing or swelling (viaMayo Clinic).

A tumor can be either benign or malignant.

Both types of issues form anywhere on your skin, tissues, bones, or organs.

Woman with a thyroid tumor

How can you tell the difference?

Often tumors are fast growing and firm, whereas cysts are tender and move around under your skin.