Gray hair may be caused by pathological or physiological reasons, often combing the hair generally can not make gray hair black.
1. Pathological gray hair: generally refers to the adolescent period, there are more hair white, and melanin deficiency has a certain relationship, leading to the cause of this situation, may be genetic factors or malnutrition and long-term mental stress, etc., often combing the hair and can not be removed from these causes, and can not make the hair black.
2. physiological gray hair: physiological gray hair refers to old age gray hair, with age, the hair part of the pigment cells will reduce, no longer produce pigment particles, this is a normal physiological phenomenon, often comb hair can not make pigment cells grow, and will not make gray hair black.
Physiological gray hair generally do not need special treatment; pathologic gray hair, should consult a doctor in a timely manner, to clarify the cause, and comply with the doctor’s instructions for medication.