The Etiological Correlation of Seven Common Types of Alopecia

Abstract

In recent years, the population suffering from alopecia in China has been increasing, which severely affects the daily life and mental health of individuals, making it one of the diseases that cannot be ignored. The occurrence of alopecia is associated with various factors, including genetic predisposition, induction by other diseases or medications, and environmental influences. Current research on the specific etiology of alopecia is not comprehensive, which hinders the diagnosis and treatment of various types of alopecia and the inhibition of hair loss from its roots or progression. This article summarizes several types of alopecia with high incidence rates, such as androgenetic alopecia, alopecia areata, frontal fibrosing alopecia, and seborrheic dermatitis, aiming to elucidate the specific causes of different types of alopecia and to organize the relationships between various forms of alopecia. This work lays a solid foundation for the diagnosis and treatment of alopecia by considering potential common etiologies and proposing three biological indicators for triggering alopecia: hormones, microorganisms, and the "common pathway" – immune dysregulation.