Causes of Female Hair Loss
In today’s world, hair is increasingly identified with youth, vitality, beauty. For a woman to lose her hair prematurely can be emotionally devastating, affecting her confidence and personal relationships . But you’re not alone. Hair loss in women is common and by the age of 60, as many as 50% of women have suffered to some degree. As with any medical condition, early detection of hair loss is the best first step towards a cure or other alleviating action.
A study from the National Library of Medicine show that around 40% of women experience female pattern hair loss by age 50, rising to over 50% by age 60 in many populations.
Some hair loss, or ‘alopecia’ is just part of the normal hair-growth cycle. Other forms are down to genetic or other factors. Here’s an overview of the possible causes of hair loss in women:
Physiologic Alopecia
Growth among the different hair follicles is not synchronous, so on any given day we will usually shed 50-100 hairs which are at the end of their growth cycle. This is quite normal and no cause for concern.
Androgenetic Alopecia
This is the most common form of female hair loss, accounting for about 75% of cases. Hair thins in the front, upper and top area of the scalp, while the back and sides retain a good ratio of productive follicles. Hereditary and genetic factors, along with aging, are the three main causes. For androgenetic alopecia, the most effective solution is a hair transplantation.
Expert Note: While many women have normal androgen levels, sensitivity to androgens and declining estrogen play key roles. Proven treatments like minoxidil or, in suitable cases, hair transplantation can help with early intervention.
Alopecia Areata
A rapid form of hair loss, which often affects patches or one side of the scalp more than the other. Often caused by a disorder in the immune system and requiring medical examination.
Anagen Effluvium
A significant and rapid loss of hair shafts during their active growing phase. Causes include chemotherapy drugs and some others, radiotherapy, poor diet, seborrhoeic dermatitis and other localised dermatoses, vitamin A poisoning, iron deficiency and chronic infection. Typically, hair regrows spontaneously once the cause has been removed.
Telogen Effluvium
Hair shafts are shed from follicles which have prematurely entered the resting phase of their growth cycle. Losses can be swift and significant, reducing a full, healthy head of hair to 1-2cm of stubble within weeks. Causes include fever, severe infection (particularly blood poisoning), major surgery, childbirth (rarely) protein deficiencies due to unsupervised crash diets, some drugs including beta blockers and anti-depressants, and severe psychological stress. Usually, hair growth will return to normal in time.
Triangular Alopecia
Loss of hair in the areas above the temples can begin as early as childhood. It may be complete or a few fine hairs may remain. Medical or surgical treatment is possible.
Loose-anagen Syndrome
the hair sits loosely in scalp follicles and is easily shed through combing or pulling. This condition occurs mainly in people with fair hair, especially in childhood, and may ease as the person ages.
Cicatricial Alopecia
This form of hairloss is also known as ‘scarring alopecia’, Cicatricial Alopecia is one of a group of rare disorders that destroy the hair follicle, replace it with scar tissue and cause permanent hair loss. Their effects can be very rapid and accompanied by severe burning and itching, or slow, on-going and otherwise symptom-free. Affected areas of the scalp may show little signs of inflammation, or may display redness, scaling, increased or decreased pigmentation, or other abnormalities. Cicatricial alopecia occurs in otherwise healthy people of all ages, worldwide.
Trichotillomania
This form of self-induced hair loss results from continuously pulling or plucking one’s hair, usually in selected areas of the scalp. Typically due to emotional or psychological causes which need to be addressed as the first step to a cure.
Traction alopecia
this form of hairloss caused by continuous stress on the hair, due to hairstyles such as ponytails, buns, braiding and cornrows. If such pulling occurs long term, the hair loss may become permanent. Usually cured by changing to a more relaxed hairstyle.
Trichologist / Hair Restoration Specialist with 10+ years’ experience helping women in Dublin and Ireland regain confidence through evidence-based hair loss solutions. Last updated: April 2026
FAQs
It’s completely normal to shed 50–100 hairs per day as part of the natural hair growth cycle. If you’re losing significantly more than this (for example, noticing large amounts in the shower, on your brush, or a widening parting), it may indicate an underlying issue such as telogen effluvium or female pattern hair loss. Tracking your shedding for a week or two can help you decide if it’s time to consult a specialist.
The most common cause is androgenetic alopecia (also called female pattern hair loss), which accounts for about 75% of cases. It typically causes gradual thinning on the top and front of the scalp while the back and sides remain fuller. Genetics, hormonal changes (especially around menopause), and ageing are the main contributing factors.
Yes — stress is a frequent trigger for telogen effluvium, a type of temporary hair shedding. Major physical or emotional stress (such as illness, surgery, childbirth, crash dieting, or prolonged anxiety) can push many hairs into the resting phase at once, leading to noticeable thinning within weeks. In most cases, hair regrows naturally once the stress is resolved.
It depends on the type. Conditions like telogen effluvium, anagen effluvium, and early-stage traction alopecia are often temporary and hair usually regrows once the cause is addressed. However, androgenetic alopecia and cicatricial (scarring) alopecia tend to be progressive and can lead to permanent loss if not managed early. Early diagnosis greatly improves the chances of slowing or reversing thinning.