Yes, 'frown lines' are simply another term for glabellar lines. These vertical lines are a result of the muscles of the glabella region regularly contracting. This region includes a tiny portion of the forehead as well as the space between the brows. Although frown lines are sometimes referred to as vertical lines between the brows and glabellar lines are sometimes regarded as horizontal lines, this distinction is not strictly medical. The terms glabellar lines and frown lines are frequently used interchangeably, thus a patient may use either term to indicate an issue with their facial skin that has to be fixed.