Hereditary predisposition.
Damage to the hair follicles: burn marks, scars and other mechanical damage.
Lack of vitamins in the body.
Frequent stress, unstable emotional state, depression. These factors often cause baldness in both of the head and of the beard.
The effects of long-term use of certain medications.
Lack of proper care, improper shaving.
A lack of testosterone in the body often negatively affects the appearance of the beard.
Age features. The beard becomes thick and uniform not immediately. During puberty and some time after the problem with the growth of the beard and mustache is normal.
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