Frown lines, or glabellar lines, are vertical lines that appear between the eyebrows. They are caused by small muscles between your eyebrows and in your forehead, an area called the glabella. Frowning and squinting contract those muscles, and over time this repeated action can cause permanent wrinkles

Crow's feet, also known as laugh lines or lateral canthal lines, are fine lines that form around the outer corners of the eyes. They can be caused by a number of factors, including:

Facial expressions

Tiny muscles in the outer corners of the eyes contract when you smile, laugh, frown, or raise your eyebrows, which can cause wrinkles.

Collagen breakdown

As you age, your skin naturally loses collagen and elastin, a protein that keeps skin firm. This can lead to loose skin that creases and becomes permanent.

Lifestyle choices

Sun exposure, smoking, and unhealthy diet choices can contribute to premature aging and the formation of crow's feet.

Forehead wrinkles are lines that form across the forehead due to facial movements and expressions, such as when someone is concerned or worried. They can also be caused by stress, sun exposure, or certain skin types.