What is that
Beard alopecia - also known as alopecia barbae - is a particular form of alopecia areata that affects the beard.
This disorder can occur both as a stand-alone event and in association with alopecia of the scalp. In fact, it has been estimated that when alopecia affects only the beard, within a year it also affects the scalp in at least 50% of cases.
Incidence
Of course, beard alopecia occurs in male patients, but with a higher incidence in young individuals between the ages of 30 and 40.