The Science Behind Chin Hair Growth
Like all body hair, chin hair grows in cycles:
Anagen (growth phase)
Catagen (transitional phase)
Telogen (resting phase)
Androgens—male hormones that are also present in women—play a major role in hair growth. An increase in androgen levels or sensitivity to these hormones can lead to more noticeable facial hair. Genetics also influence hair follicle density and distribution, which is why some women naturally have more facial hair than others.