From unhealthy habits to genetic ageing patterns, there are several key reasons for crow’s feet to appear. Everyday behaviours such as repeated squinting in bright sunlight are often all it takes to cause the early onset of Crow’s Feet.Over time, your skin’s ability to produce collagen decreases, leaving your skin less elastic and more likely to fix in place when it’s repeatedly stretched and relaxed.
When you smile, squint, or frown, your skin is pulled tight and then loosened, which can produce lasting lines. Since not smiling simply isn’t possible, Crow’s Feet are one of the most common facial expression wrinkles.
Think of your skin as a form of fabric. When you’re young, collagen keeps your skin as flexible as possible like a piece of elastic fabric.  Over time, decreases in collagen make your skin more likely to wrinkle when stretched, like a cotton garment.