Wavy hair is caused by a combination of genetics, hair follicle shape, and the distribution of keratin in the hair shaft. Hair texture is primarily determined by genetics, meaning the traits passed down from your parents can influence whether your hair texture is straight, wavy, or curly.

The form of the hair follicle plays a significant role in determining hair texture. Oval-shaped hair follicles typically result in wavy hair, as opposed to round follicles that produce straight hair or more elliptical ones that produce curls. The shape affects how the hair grows out of the scalp and how it interacts with the natural curl pattern.

Another factor is the distribution of keratin, the protein that creates the structure of hair. In wavy hair, keratin is spread unevenly along the hair strand, which creates a wave-like pattern. Environmental elements, such as humidity, can also enhance the appearance of waves by affecting the hair’s natural moisture balance.

Overall, wavy hair is a beautiful blend of genetic factors and biological processes, resulting in its signature textured appearance.