Hormonal Changes Identified as Major Cause of Hair Loss

Experts explain that fluctuations in hormones such as androgens, estrogen and cortisol significantly affect scalp health and hair growth. Elevated androgens increase the production of dihydrotestosterone (DHT), which shrinks hair follicles and leads to thinner, shorter hair, a condition known as androgenetic alopecia. Estrogen extends the active growth phase of hair follicles, which is why many women experience thicker hair during pregnancy, while reduced estrogen levels after childbirth or during menopause trigger increased shedding. Elevated cortisol, the stress hormone, can disrupt the normal hair‑growth cycle and cause premature shedding.

Medical conditions including polycystic ovary syndrome, thyroid disorders, lupus and diabetes can also contribute to hair loss, and treating the underlying disease often improves hair condition. Professionals advise individuals who notice accelerated thinning, visible bald spots or overall reduced hair density to consult a dermatologist, who may recommend hormonal testing or referral to an endocrinologist for accurate diagnosis and appropriate therapy.