Glabellar Lines
The so-called frown lines (also known as glabellar lines or thinker's lines) are vertical folds of skin that form between the eyebrows when they are drawn together in anger or when thinking deeply.
The so-called frown lines (also known as glabellar lines or thinker's lines) are vertical folds of skin that form between the eyebrows when they are drawn together in anger or when thinking deeply.