Hair thinning in women is commonly caused by female pattern hair loss, temporary shedding after stress, illness or childbirth (telogen effluvium), hormonal conditions such as PCOS and thyroid disorders, iron or vitamin deficiencies, tight hairstyles and some medicines. Treatment depends on the cause and may include correcting deficiencies, managing hormonal conditions, topical or oral medicines prescribed by a doctor, and procedures such as PRP in selected cases. Because several causes can overlap, a proper scalp examination and, often, blood tests are the first step.
This guide explains the common causes of hair thinning in women, the signs to watch for and the treatment options you can discuss with a doctor.
How Hair Grows and Sheds
Each hair follicle goes through a growth phase (anagen) lasting several years, a short transition phase and a resting phase (telogen), after which the hair falls out and a new one begins to grow. Losing around 50 to 100 hairs a day is normal. Thinning happens when more hairs shift into the resting phase, or when follicles gradually produce finer, shorter hairs.
Signs of Hair Thinning in Women
- A widening centre parting
- More scalp visible on the crown or centre of the head
- A thinner ponytail
- Increased hair on the pillow, comb or in the shower drain
- Finer, weaker hair strands
- Receding hair around the temples in some women
Common Causes of Hair Thinning in Women
Female pattern hair loss
This is a gradual thinning over the crown and centre of the scalp, usually with the front hairline preserved. Genetics and sensitivity of hair follicles to hormones play a role. It can begin at any age after puberty and becomes more common after menopause.
Telogen effluvium
A sudden increase in shedding can happen two to three months after a trigger such as high fever, surgery, childbirth, crash dieting, major emotional stress or stopping hormonal pills. Our article on whether stress can cause hair fall explains this link.
Hormonal conditions
- PCOS: higher androgen levels can cause scalp thinning along with acne and excess facial hair
- Thyroid disorders: both underactive and overactive thyroid can cause diffuse shedding
- Menopause: falling oestrogen levels can make hair finer
Nutritional deficiencies
Low iron stores, vitamin D, vitamin B12, protein or zinc may contribute to hair shedding. Very restrictive diets can also trigger hair loss.
Hair care practices
Tight ponytails, braids and buns can cause traction alopecia around the hairline. Frequent heat styling, bleaching and harsh chemical treatments can make hair break.
Scalp conditions
Dandruff, seborrhoeic dermatitis, fungal infections and psoriasis can affect scalp health. Patchy hair loss may be due to alopecia areata, an autoimmune condition.
Medicines and medical conditions
Some medicines, anaemia, autoimmune conditions and recent illnesses can contribute to hair thinning. Do not stop prescribed medicines without speaking to your doctor.
How Is Hair Thinning Evaluated?
An evaluation usually includes:
- History of when the thinning started, any triggers, diet, periods, pregnancy and medicines
- Scalp examination, sometimes with a magnifying tool (trichoscopy)
- A gentle hair pull test to assess shedding
- Blood tests as advised, such as haemoglobin, ferritin, thyroid function, vitamin D, vitamin B12 and hormone tests when PCOS is suspected
When the cause is unclear or the pattern suggests a scalp disease, referral to a dermatologist may be advised.
Treatment Options for Hair Thinning in Women
Treating the underlying cause
Correcting iron or vitamin deficiencies, managing thyroid disorders or PCOS with your doctor and allowing time for recovery after a trigger are important first steps. In telogen effluvium, hair often recovers over several months once the trigger has passed.
Medicines
Topical and oral medicines may be prescribed for female pattern hair loss by a qualified doctor. They usually need consistent use over months, and the doctor will explain possible side effects and precautions, especially if you are pregnant or planning pregnancy.
PRP therapy
Platelet-rich plasma uses a concentrate from your own blood, injected into the scalp. It is one of the options sometimes considered for certain types of thinning. Responses vary, and it is generally discussed after the cause has been assessed. Learn more about how PRP hair treatment works and how it compares in PRP vs mesotherapy.
Other supportive measures
- A balanced diet with adequate protein, iron-rich foods, fruits and vegetables
- Gentle hair care: loose hairstyles, minimal heat styling and mild shampoos
- Treating dandruff or scalp inflammation
- Stress management, sleep and regular physical activity
Avoid starting supplements or online remedies without advice, as excess intake of some vitamins can cause harm.
When Should You Seek Help?
- Shedding lasts more than three months
- You notice patches of hair loss
- Thinning comes with irregular periods, acne or excess facial hair
- There is scalp pain, redness, scaling or scarring
- Hair loss is affecting your confidence or daily life
Frequently Asked Questions
Is it normal for women to lose hair every day?
Yes. Losing around 50 to 100 hairs a day is considered normal as part of the hair growth cycle. Noticeably more shedding, a widening parting or visible scalp may suggest hair thinning that is worth checking.
What is the most common cause of hair thinning in women?
Female pattern hair loss, which causes gradual thinning over the centre of the scalp with a widening parting, is one of the most common causes. Temporary shedding after illness, childbirth or stress (telogen effluvium) is also common.
Can thyroid problems or low iron cause hair thinning?
Yes. Both underactive and overactive thyroid, as well as iron deficiency, can contribute to hair shedding. Blood tests can check for these, and treating the underlying cause is an important part of management.
Does PCOS cause hair thinning?
PCOS can raise androgen levels, which may cause thinning on the scalp in some women, along with irregular periods, acne or excess facial hair. Managing PCOS with your doctor is part of addressing the hair changes.
Does hair grow back after postpartum hair fall?
Hair shedding a few months after childbirth is common and usually settles over several months as hormone levels stabilise. If shedding continues beyond a year or the hair looks much thinner, a check-up is advisable.
Is PRP useful for hair thinning in women?
PRP (platelet-rich plasma) is one of the options sometimes used for certain types of hair thinning. Responses vary between individuals, and it is usually considered after the cause has been evaluated. Discuss suitability, sessions and possible side effects with your doctor.
Visit Eclair – The Skin and Hair Clinic, Kharadi
If you are noticing thinning or increased hair fall, a consultation can help look at possible causes and discuss options suited to you. Eclair is led by Dr. Nikita Surve, an aesthetic physician with experience in trichology and non-surgical treatments. See our hair loss treatment page for more details.
- Address: Office No. 109, 1st Floor, Zen Square, towards Panchshil Towers Road, Kharadi, Pune
- Phone: +91 86260 96494
You can also book through our contact page.