What is often a visible sign of trichorrhexis nodosa?

Trichorrhexis nodosa is a hair disorder characterized by the presence of knots, or nodes, along the hair shaft. These knots are formed due to the weakening of the hair structure, which can lead to split ends and a brittle appearance. The condition causes the hair to break at these points, resulting in visible lumps or bumps that are a hallmark sign of the disorder. Identifying these knots is crucial for diagnosing trichorrhexis nodosa, as they distinctly indicate the unevenness and structural damage to the hair that this condition causes.

While other conditions may lead to uneven hair length, scaly scalp, or excessive shine, these are not specific indicators of trichorrhexis nodosa. The prominent feature of knots in the hair shaft differentiates this condition from others, signifying its importance in hair health assessment.