Types of Hair Loss
Genetic hair loss is the most common cause of hair loss in both men and women.
Male pattern Baldness is purely genetic and is associated with the conversion of the androgen testosterone into di-hydro-testosterone (DHT) by the enzyme 5-alpha reductase.
Follicles effectively shrink and eventually produce only fine vellus hairs. The more close family members that have genetic hair loss, the higher the percentage chance there is for an individual to also suffer from the condition.
The hair usually first begins to recede at the temples of the hairline or in the crown area. In advanced stages the whole top of the head, including the front and crown areas, thins out.
The stages of MPB (Male Pattern Baldness) are generally classifieds as follows. this also helps in studying hair loss treatments.
Female pattern baldness is known to be caused by DHT acting on the hair follicle. The hair loss in FPHL is typically diffuse and affects the vertex and frontal areas with similar severity. The ludwig scale categorises the type and extent of genetic hair loss in women in the following way. Androgenic Alopecia in women is caused bfollicular miniaturisation associated with endocrine changes and increased androgen presence. Accompanying factors may include: Polycystic ovarian syndrome, virilisation (and hirsutism), irregular menstruation, infertility, acne, seborrhoea oleosa.
Hairs will grow for a few years, and then rest for a few months, shed, and regrow. Hair growth cycle consists of three phases namely, anagen phase, catagen phase and telogen phase. Telogen is the name for the resting stage of the hair growth cycle. Telogen effluvium is characterized by massive hair loss as a result of early entry of hairs into the telogen phase.
Telogen effluvium occurs when some stress causes hair roots to be pushed prematurely into the resting state. Telogen effluvium can be acute or chronic.
There is considerable number of different causes due to which this precondition is occurred and they are:
Emotional or physiological stressful events may result in an alteration of the normal hair cycle. It may be due to a variety of causes like eating habits, fever, childbirth, chronic illness, major surgery, anemia, severe emotional disorders, crash diets with inadequate nutrients and a variety of medications.
Typically, Telogen effluvium hair loss is noticed several weeks to several months aft the incident has initiated the biologic program for hair loss. Some individuals may also notice hair loss elsewhere on the body although most often hair loss occurs on the scalp. Generally shedding slowly reduces over 6-8 months once the cause of hair disappears.
Anagen effluvium is the disturbance to the hair follicle which impairs the hair's normal metabolism, such as cell division and synthesis.The most common cause of anagel effluvium is exposure to chemotherapeutic agents that treat cancer. Other causes could be malnutrition, chronic infections and certain medications.