Hair Loss by Type

Female hair loss generally progresses in two patterns: a “Christmas tree” pattern in which the crown thins, and a pattern in which the M-shaped front of the hairline recedes. One in four women carries a predisposition to female pattern hair loss, and the causes are varied, including dieting, smoking, polycystic ovary syndrome, iron-deficiency anemia, and thyroid disease. Even without any of these causes, it can progress from genetic predisposition alone.

There is no cure for female pattern hair loss. Because it is inherited at birth, the key is to manage it a little at a time throughout life and maintain it so that no more hair is lost. For that reason, rather than a treatment that requires an hour or two per week, it is important to choose a method that is evidence-based and that you can sustain for a lifetime.

Female hair loss is not only a matter of the hair itself but is closely linked to hormones. Polycystic ovary syndrome can relatively raise male hormone levels and act on the hair follicles, causing androgenetic hair loss. Uterine fibroids do not in themselves cause hair loss, but if menstrual flow increases and leads to anemia and iron deficiency, the hair may not receive adequate nutrition, which can lead to hair loss.

• When hair becomes thinner and less dense, it may be a health signal rather than a cosmetic issue.
• If iron deficiency is suspected, an anemia test is recommended first.
• Because birth control pills affect hair loss differently depending on their type and the hormonal state, hormone levels are checked regularly.

For thinning where the part widens and the crown looks sparse, treatment takes priority over transplantation. This is because a hair transplant only relocates follicles and does not increase the total number. Injecting harvested hair follicle stem cells into the crown allows hair that had thinned in the resting phase to grow, increasing follicular density and thickness, with a change usually appearing in 3 to 6 months. The design that creates a new front hairline is covered separately under Female Hairline Design Transplant.

After age 25, the hairline recedes and the forehead widens even without a hair-loss gene. Over a lifetime it recedes by about 2 cm on average, with both sides rising slightly more to form a gentle V shape — this is not male pattern hair loss but the process of hairline “maturation.” Maturation usually stops without exceeding a 2 cm range from the original line, so it does not require treatment. Male pattern hair loss, by contrast, recedes steadily beyond this range and progresses into a shape that is concave on both sides and convex in the middle. The two differ in direction, so they are distinguished first through a consultation.

Male pattern hair loss is a common condition that more than half of all men experience at least once in their lives. The core of the mechanism is 5-alpha-reductase, an enzyme that converts the male hormone testosterone into DHT, which causes hair loss and gradually thins the follicles. 5-alpha-reductase inhibitors such as finasteride and dutasteride are used to block this conversion, slowing and preventing the progression of male pattern hair loss.

Because male pattern hair loss is a progressive condition, it does not end with a single procedure. A hair transplant is surgery that rearranges your own follicles, so it cannot increase your total number of hairs, and the amount that can be transplanted over a lifetime is also limited; therefore, for moderate or more advanced cases at Norwood stage 5 or above, a plan is needed that conserves hair and places it most efficiently after observing the response to medication thoroughly. The crown often improves with medication alone, so trying medication first and adding a transplant when needed is the way to conserve hair.

Hair repeats a cycle of an anagen (growth) phase, a catagen (regression) phase, and a telogen (resting) phase as it waits to fall out. When the body is subjected to a shock — such as childbirth, an illness with high fever, major surgery, rapid weight loss, or severe stress — a large amount of hair shifts into the telogen phase all at once about 2 to 3 months later and sheds across the scalp; this is telogen hair loss. Rather than a specific area thinning, it appears as a reduction in density across the whole head.

If the cause is temporary, it usually recovers naturally over several months. However, if the cause persists — such as anemia, thyroid disease, or nutritional deficiency — testing is needed to find and correct the cause. Because it differs in nature from genetically progressive androgenetic hair loss (female and male pattern) and calls for a different approach, the first step is to confirm what is causing the shedding.

If a great deal of hair suddenly sheds across the whole head, identifying the cause comes before self-diagnosis. Distinguish the type through a consultation, then decide on a direction.

Whether treatment or transplantation comes first, and whether medication, injection, or transplantation is right for you, depends on the type of hair loss and the condition of your scalp. Start with an accurate diagnosis.