Before we talk about how to reduce the lines on your forehead, its useful to know what causes them. When it comes to wrinkles in general, there are endless variables that contribute to when and where they appear as we age, from genetics to how much sun exposure we get and even screen time (it has been suggested that blue light, like UV, is capable of breaking down collagen’s structure). However, two of the most famous culprits of forehead wrinkles are a decrease in the production of collagen and elastin as well as muscle movement. This is due to the fact that around the age of 25, many of our skin’s functions begin to decline. Collagen and elastin are two vital protein building blocks whose function is to keep our skin pliable and bouncy when we’re young. When the production of these proteins tail off, so does our skin’s resilience and, as a result, lines start to appear. To add to this, the natural expressions your face makes on a daily basis can also contribute to how fast these wrinkles materialize and turn from dynamic into static. Dynamic wrinkles are, as their name suggests, wrinkles that appear with activity (i.e. facial movements). Static wrinkles, on the other hand, are dynamic wrinkles that remain on the face regardless of which expressions we make throughout the day. These are what forehead lines eventually become. Your frontalis muscle (the expanse of muscle that enables you to perform movements like raising your eyebrows or frowning) forms a major part of our facial animations, which is why it’s one of the muscles that’s most likely to contribute to static wrinkles.