Fine lines are often the first sign that our skin is changing, and it's completely natural to feel a bit taken aback when you first spot them. Fine lines are the start of wrinkles and look like small creases on your skin. They're closer to the surface, whereas wrinkles are deeper. You'll typically notice them first around your eyes when you smile, or in little expression lines that used to disappear but now seem to stick around a bit longer.
As people get older, their skin becomes thinner, drier and less elastic, which means it's less able to protect itself from damage. Think of it like a favourite piece of clothing that's been washed many times — it's still beautiful, but the fabric doesn't bounce back quite the same way.
Most people start to see signs of ageing on their skin after turning 25, though you probably won't really notice them until your thirties or forties. The most common age group for wrinkle treatment is between 40 and 55. So if you're reading this and thinking "this is happening earlier than I expected," you're actually right on schedule.