Is Thyroid Dysfunction a Common Cause of Telogen Effluvium? A Retrospective Study

A retrospective study of 500 female patients with telogen effluvium (TE), a hair loss condition, found a significant association between hypothyroidism and TE. The hypothyroidism group had a higher mean Severity of Alopecia Tool (SALT) score and a higher proportion of patients with severe hair loss (SALT score > 50). However, there was no significant difference in hair loss severity between the normal thyroid function (euthyroid) and hyperthyroidism groups. The study concluded that hypothyroidism is a common underlying cause of TE, but the relationship between hyperthyroidism and hair loss requires further research.