What underlying issue might cause persistent vellus hair growth in clients?

Persistent vellus hair growth in clients can often be attributed to hormonal imbalances. Hormones play a crucial role in regulating hair growth, and fluctuations in hormones, such as androgens or estrogen, can lead to increased hair growth in the form of vellus hair. Conditions like polycystic ovary syndrome (PCOS) or thyroid disorders can cause such hormonal disruptions, which can manifest as unwanted hair in areas that are typically less hairy or through the development of fine, soft hair known as vellus hair.

While genetics, environmental factors, and dietary habits can influence hair growth to some extent, they do not have the same direct and profound impact that hormonal imbalances have. Genetics may dictate the density and type of hair a person has, and environmental factors could possibly affect hair growth indirectly, but they are not usually the root cause of persistent vellus hair. Similarly, while dietary habits can affect overall health and hormonal balance, they are less likely to be the primary reason for distinct changes in hair growth patterns. Therefore, understanding the influence of hormonal imbalances is key in addressing persistent vellus hair growth effectively in clients.