The first, the real one, appears around the age of 25 and affects all skin types. It is a fine line of dehydration:the hydro-lipid film is altered and the dry skin begins to mark, especially on the eye contour. The term "first wrinkle" is also used to designate expression or dynamic wrinkles, linked to facial movements (when you frown, squint, etc.), or even chronological wrinkles, which begin to appear around the age of 30, because the collagen is no longer synthesized in a qualitative way (=we destroy more of it than we produce).
The good news is that as long as the wrinkles are not deepened, they are reversible. Hence the importance of taking care of your skin in prevention and choosing active ingredients