What is a result of trichoptilosis?

Trichoptilosis is a condition commonly known as split ends. This occurs when the protective outer layer of the hair cuticle is damaged, leading to the hair shaft splitting into two or more strands at the tip. This damage can be caused by various factors, including excessive heat styling, chemical treatments, environmental stress, or lack of proper hair care. When hair is split at the ends, it can lead to frizziness and an overall unhealthy appearance.

In contrast, the other options describe hair characteristics or conditions that are not associated with trichoptilosis. Thick hair refers to the density of hair strands, hair curling pertains to the texture or shape of the hair, and oily hair relates to the oil production of the scalp, none of which directly connect to the phenomenon of split ends. Therefore, recognizing that trichoptilosis signifies the splitting of hair ends directly supports the understanding that the correct answer is, in fact, split ends.