FOREHEAD FURROW
Horizontal lines appear across the forehead due to the eyebrows being pulled together and slightly raised.
Worry, concern, or empathic processing of difficult information.
Distinct from the glabella knit (which is downward and inward). The furrow is upward and outward, and signals concern for someone else. A useful indicator of empathy in counsellors, doctors, and skilled negotiators.
Eyebrow knit, which is anger or concentration.
