The active growth stage when the hair is nourished by the blood supply and continues to grow.Catagen (Transitional Phase): A brief stage in which hair growth stops and the follicle detaches from its blood supply.

Telogen (Resting Phase): The hair rests, eventually sheds, and is replaced by new growth.Several factors influence chin hair growth, with androgens—male hormones present in both men and women—playing a central role.

Elevated androgen levels or increased sensitivity to these hormones can trigger more visible facial hair, including on the chin.Genetics also play a major part. Hair follicle density and distribution vary from person to person, meaning some individuals naturally grow more facial hair than others.

Women with a family history of excessive facial hair are more likely to experience thicker or more noticeable chin hair. Understanding the biology behind chin hair growth reveals why it differs from one person to another—largely due to a combination of hormonal and genetic influences.