How can severe hair loss be treated?

Severe hair loss—medically termed telogen effluvium, androgenetic alopecia, or, less commonly, alopecia areata or scarring alopecia—requires prompt, individualized evaluation. The first and most critical step is identifying the underlying cause, as treatment depends entirely on etiology. Common contributors include hormonal imbalances (e.g., thyroid dysfunction, polycystic ovary syndrome), nutritional deficiencies (especially iron, ferritin, vitamin D, zinc, and biotin), chronic stress, major illness or surgery, certain medications (e.g., anticoagulants, retinoids, antidepressants, beta-blockers), and autoimmune conditions.

A thorough clinical assessment should include a detailed history (onset, pattern, duration, family history, medications, diet, menstrual or metabolic changes), physical examination of the scalp (looking for signs of inflammation, scaling, scarring, or miniaturization of follicles), and targeted laboratory testing—such as complete blood count, serum ferritin, thyroid-stimulating hormone (TSH), free T4, vitamin D, and, when appropriate, testosterone and sex hormone–binding globulin (SHBG) in women.

First-line evidence-based treatments vary by diagnosis: For androgenetic alopecia, topical minoxidil (5% for men, 2–5% for women) and oral finasteride (men only) or spironolactone (women only, with contraception counseling) are FDA- or guideline-endorsed options. In telogen effluvium, management focuses on addressing the trigger—such as correcting iron deficiency, optimizing thyroid function, or reducing physiological stress—with spontaneous regrowth typically occurring within 6–12 months once the inciting factor is resolved. Alopecia areata may respond to intralesional corticosteroid injections, topical immunotherapy (e.g., diphenylcyclopropenone), or newer systemic agents like JAK inhibitors (e.g., baricitinib, ritlecitinib) in moderate-to-severe cases.

Lifestyle and supportive measures—including a balanced diet rich in protein and micronutrients, gentle hair care practices (avoiding traction, heat, and harsh chemicals), and psychological support—are essential adjuncts. Referral to a board-certified dermatologist specializing in hair disorders is strongly recommended for persistent, progressive, or atypical hair loss to ensure accurate diagnosis and timely intervention.