How to differentiate between “Androgenic Alopecia” (Male Pattern Hair Loss) and “Telogen Effluvium” (Temporary Hair Loss) in hair loss treatments?

Androgenic alopecia has a genetic basis; it results from the sensitivity of hair follicles to the hormone DHT (Dihydrotestosterone). Hair doesn’t fall out suddenly, but rather becomes miniaturized (thinned, becoming downy) over time, revealing a noticeable receding hairline in the crown/front hairline; it is chronic and requires lifelong treatment. Telogen effluvium, on the other hand, is a sudden and widespread hair loss triggered by stress, childbirth, severe diets, infections such as COVID-19, or vitamin deficiencies (iron, B12, vitamin D). There is thinning throughout the hair, but the follicles are not dead; they have simply entered the resting (telogen) phase. When the correct trigger is identified and supported by clinical treatments, the hair can completely return to its former density.