1) Heredity

Different races and different ethnic groups have different hair-growths. Hirsutisum is a part of some diesease process.

2) Psychological make up of a person

Tolerence to stress varies from person to person. Present day life-style and pollution contribute to this.

3) Hormonal Changes

Certain causes like increased testosterone levels, PCOS, menopause etc can lead to increased facial hair growth.

4) Hormones in food

Many animals and plants are fed different hormones to get a better yield.These food items when consumed cause hair-growth. Back