[Eli5] Why do people get bald on the back or front of their head rather than their face, chest or genitals?

Question

[Eli5] Why do people get bald on the back or front of their head rather than their face, chest or genitals?

In: 35

Answer 1

Gene expression in certain regions of the scalp makes the follicles want to kill themselves after a certain point when exposed to DHT or Testosterone (which bind to the same receptor). We have no idea why they do that.