The phases of hair growth
Each follicle (hair bulb) since its inception in iterative cycles of active growth and dormancy:
- anagen (hair growth phase)
- catagen (transitional phase)
- telogen (resting phase)
The normal duration of the anagen everyonegenetically determined and lasts from 2 to 5 years. The duration of the telogen is approximately 100 days. Normally, the percentage of hair being in the telogen stage, small. The average percentage of hair in the anagen phase are, catagen and telogen, is respectively 85, 14 and 1 percent. Increasing the number of telogen hair up to 20 percent is an unfavorable sign.
Thus, the hair growth is cyclical: for the growth phase, or anagen, followed by a short transitional stage, catagen, and then - rest phase or telogen, when the hair stops growing and falls. At the end of the telogen in the follicle (hair bulb) begins to grow new hair.
Hair grows continuously, but during the day they growfaster than at night, and in the spring and in the autumn of their accelerated growth. In males grow faster than females. The average rate of hair growth in children - 13 mm, in adults - 15 mm and the elderly - 11 mm per month.
Telogen alopecia (diffuse alopecia)
It is characterized by abundant hair loss, sometimesamplified in certain periods of the year, with a consequent weakening of the hair growth. With telogen alopecia hair follicles too quickly passes from the growing stage (anagen) in the stage of rest (telogen). As a result, the daily hair loss is significantly increased, and the hair can significantly poredet.
Causes of diffuse alopecia
The causes of telogen alopecia,may be pregnant (which ended in abortion or childbirth), cancellation of oral contraceptives or a change of medication, a large surgery, severe trauma, a strict diet with rapid weight loss, severe illness (especially with fever), stress, overwork.
There men and women as a result ofvarious reasons: high fever, bleeding, starvation, injury, after birth, severe emotional stress, chronic poisoning, occurs in women who use birth control contraceptives, along with pustular rash.
There are cases of hair loss and changes in theirpigmentation of many drugs used in therapeutic practice: cytostatics, anticoagulants, boric acid, and anti-malarial agents thyreostatics, bismuth and others.
There are diffuse alopecia dueendocrine disorders (hyperthyroidism, hypothyroidism, pancreatic disease, hypofunction of sexual glands) and arising during hemodialysis in patients with chronic renal failure. With the termination of the pathological agent, hair growth resumes.
It should also be noted that there arephysiological variations telogen hair loss: this hair loss during pregnancy and immediately after birth; This thinning hair in women aged 16-19 years; This hair loss in old age. However, in all these cases, you must be sure that we are not dealing with the initial stage of androgenetic alopecia.
Recently noted that the largerbald - the greater the chance of developing heart disease, according to the Boston researchers. According to them, in individuals with pronounced baldness, heart disease risk increased by 36 percent.
Treatment of diffuse alopecia
Must be at a known pathogenicdue to illness. When posleinfektsionnoy and postoperative alopecia - restorative therapy, are also shown arsenic preparations, vitamins (B1, B6, A and C), high-calorie food, methionine.
Local treatment is to appointirritating scalp alcoholic solutions, physiotherapy (UFL, D'Arsonval current irrigation chloroethyl, massage, carbonic acid snow, etc.). People who suffer from hair sparse, be aware that this contributes to frequent hair coloring and perming.
In this issue, the greatest impact on the condition of the hair and scalp have:
- vitamins A, E, B1, B6, C
- trace elements magnesium (Mg), aluminum (Al), silicon (Si), potassium (K), manganese (Mn), iron (Fe), zinc (Zn), copper (Cu).