Forehead wrinkles are a type of expression line, also known as dynamic wrinkles. They appear from repeated contractions of the facial muscles during various facial expressions. On the forehead, the frontalis muscle is mainly involved when the eyebrows are raised or furrowed.
Due to its high mobility, the forehead is one of the first areas of the face where these wrinkles become visible. Initially noticeable only when making facial expressions, they eventually remain visible even when the face is at rest. Horizontal wrinkles then appear across the entire width of the forehead, whilst vertical wrinkles may form between the eyebrows: these are frown lines.
To better understand this process, see also our article on Expression Lines.



















