Forehead wrinkles are caused by the action of the frontalis muscle on the forehead. This muscle contracts when we raise our eyebrows. The raising of the frontalis muscle pulls the skin of the forehead up and causes forehead wrinkles which appear as lines across our forehead.
One of the first areas that show the signs of aging is the forehead. Horizontal creases are commonly seen in the 30s & deepen with time. Simple anti-wrinkle injections can provide noticeable, but natural rejuvenation to this area.