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Primary causes of hair loss in women

Hair loss in women is multifactoral that means there is usually more than one cause. Some of the common causes include hormone changes during menopause1, peri-menopause, following childbirth, taking the contraceptive pill as well as illness, stress2, restricted protein and decreased nutrition (eg during strict dieting). Vitamin deficiency3 such as from low iron and vitamin B and D can also be a contributing factor for hair loss in women.

Several health conditions, including thyroid disease, iron deficiency anemia, and secondary syphilis, are also known to cause hair loss. 

No matter what is worrying you or concerning you about your hair falling out, please be assured that you are not alone and you have come to the right place.

causes of hair loss in women

Unexpected episodes of hair loss in women, whether sudden or gradual is more common these days than it's ever been.

This has been written by women for women. We are women who have also suffered from varying degrees of female hair loss due to unexpected factors so we have a lot to share with you. We have outlined the 10 most common causes of hair loss in women here and you will also find some great solutions.

Hair naturally thins out as we age and this often happens gradually. However, noticeable or sudden hair loss occurs most of all at two specific times in a woman's life - during/following menopause and following pregnancy. Read more about these specific causes at the links below:

Post menopause causes of hair loss and solutions   |   Post pregnancy causes of hair loss and solutions | How does menopause affect our hair

With about 1 in 4 women suffering hair loss there are clearly other causes too. So here we list some of the most common causes of hair loss in women and some suggested solutions.

But first, let's understand the mechanics of hair loss in a female (it is different for men).

FEMALE HAIR LOSS: MORE THAN ONE CAUSE

According to a recent review published in the International Journal of Women's Dermatology, Female pattern hair loss: A clinical, pathophysiologic, and therapeutic review, hair loss in women is polygenic (can be influenced by more than one gene) and multifactorial (dependent on a number of factors) with the additional influence of environmental factors.

So we know there are a broad a range of causes from the obvious such as damaging it with peroxides and other chemicals, to hidden causes such as systemic inflammation and stress.

But since the cause can be multifactorial there are literally dozens of combinations. Women join Facebook groups hoping to find the answer from other women, but the truth is, what is causing the problem for one woman, may only be half the story for another. 

And even worse, is that women are prescribing OTC medications to one another online! It is horrifying to see women telling other women to start taking over the counter supplements like iron or Vitamin D when they have absolutely no knowledge of the overall health of the other woman, nor any real idea what could be causing the other woman's hair loss.

FEMALE HAIR LOSS - TRIGGER PLUS CONTRIBUTING FACTORS

So while we have listed some of the most common causes below, it is becoming more and more evident as more research is done on this topic, that the real issue is likely to be a combination of factors. 

A common combination is menopause and poor diet or low nutrition often caused by women in menopause taking on crash diets or ketogenic diets to eliminate their menopause weight gain. So menopause is not the direct cause of hair loss in all women during menopause, but when combined with crash dieting, poor nutritional input, or strong genetic predisposition, (all of which are known to contributors to female hair loss) it would appear on the surface that menopause is the sole cause.

One of the main contributing factors (and not a cause of female hair loss on its own - necessarily), is stress. For the past sixty or seventy years, women have taken on professions once exclusively male dominated. Yet still women are child-bearing and child-raising. Combine this with the contraceptive pill and the resulting hormonal effect, full time work, family juggling as well as the long term stress effect, and you find women of all ages with all kinds of new ailments such as chronic weight gain, heart disease and hair loss. Not that these were unheard of previously, but they have become far more prevalent in the past thirty years than they ever were.

How does stress affect hair loss?

So as you read through these causes, look for contributing factors. Try to identify your initial trigger and then look to see if there is a secondary factor that is at play. 

You hear of women who take iron supplements and their hair grows back, then you hear of a woman who changed her shampoo and her hair grew back. But there are equally as many, if not more, for whom those solutions did nothing. This is due to both the trigger and the contributing factor (or factors) working together. 

Age and Menopause

Although a change in hormone levels can be responsible for thinning hair during and after menopause, it is worth noting that following menopause, hair can be thinning out in one of three ways:

First, the natural growth cycle may be interrupted and/or slowed resulting in diffuse hair loss. This is generally caused by a change in hormone levels.

Secondly as we age, our hair follicles can get narrower and this gives the appearance of less hair, when in fact you may have the same number of hairs, they are just much finer. This is especially the noticeable for women who had very thick dark colored hair.

And lastly, low estrogen is also known to make hair dry and therefore more susceptible to breakage.

Low Iron and B12

Feeling tired as well as noticing some hair loss? In that case, the cause of your hair loss could be low iron and/or vitamin B12. Think this is possible? Read more about low iron and hair loss here. The good news is that once the proper levels are restored with the help of supplements and/or diet changes, your hair loss may subside. Head to your doctor for a blood test to find out if this is your issue.

 Post partum

During pregnancy, a lot of women will actually experience thicker hair due to the peak in estrogen levels. This ceases, however, once your baby is born so it is common to experience hair loss after childbirth. Just sit tight, focus on your new bub and your hair should return to normal. For information and advice on what you can do for postpartum hair loss click here.  

Polycystic Ovary Syndrome (PCOS)

Although extra hair growth on the body is common in women with PCOS, in a cruel twist of fate the hormonal imbalances can also cause hair loss in women. So, more hair where you don’t want it and less hair where you do. Unfair. To confirm this diagnosis you should see your GP. In the meantime, if you are conscious of a visible scalp, shake in a concealer like Boost N Blend™ and you will BOOST hair at the roots instantly. 

Medication

If you’re taking any regular medications, you may not be in 100% tip top physical condition. Many illnesses or just being unwell can cause hair loss in some women and sometimes it can be the medication itself. It’s important not to overlook any medications you may have been on long term (I’m looking at you, contraceptives) where you have altered your dosage or recently stopped taking them altogether.

Extreme Weight Changes

Putting yourself on a restrictive diet can mean you miss out on some essential nutrients and that can cause thinning hair in women. Likewise, gaining a significant amount of weight quickly can also put your body out of whack and mean that you experience thinning hair. So stay away from the fad diets if you don’t want to lose more than weight.

If you've recently been on a ketogenic diet you can read the full story on how ketogenic diets affect our hair here.

Illness

Because hair is viewed by the body as non-essential, it is often the first thing the body stops assigning resources to, meaning it can begin to fall. Hair loss is a common symptom of a lot of illnesses e.g. autoimmune diseases, but what you may be surprised to learn is that hair loss in women can be caused by acute illnesses like gastro. These short but intense illnesses can put enough temporary stress on the body which can lead to hair loss in women usually around three months later. The good news is that this type of hair loss can usually right itself without intervention.

Over styling

It’s probably not much of a surprise that heated styling products like straighteners, curling irons and hair dryers can cause hair loss in women, but did you know that your hairspray, gel or even the type of shampoo you use could also be causing your thinning hair? Be careful not to overuse styling products or opt for natural products. Whilst you’re at it, be careful with your poor head! Simple things like tight ponytails and harsh brushing can also cause hair loss. 

Gut Issues

It should be no surprise that a healthy gut is needed for an overall health body. It's all very well to be careful what you eat and to have a generally good diet, but if your gut is not healthy (eg IBS) and you are not able to absorb the nutrients in your food then your hair follicles are not getting fed.

What you eat goes through your intestinal system during which time your gut wall absorbs all the goodness out of your food, leaving just the waste.

If you have any kind of gut issue like chronic diarrhoea, IBS or if you are taking a medication that is affecting your gut health (some drugs can cause diarrhoea which can lead to malabsorption, antiobiotics can also mess with gut health) then it is worthwhile seeing your doctor about it. If your hair loss cause is an unhealthy gut, the good news is, once fixed hair loss can be reversed. 

An unhealthy scalp 

An unhealthy scalp can cause inflammation which then makes it difficult for hair to grow. Some of the skin conditions that can lead to hair loss include seborrheic dermatitis (dandruff), psoriasis, and fungal infections such as ringworm. If you are a gardener, think of your scalp like the soil you put your plants in. Great soil = healthy plants. When the soil is dry, parched and lacking in nutrients, then nothing can grow. Our scalp is the same. Be careful with super hot water, use chemical free shampoos and conditioners and try to avoid getting your scalp sunburnt.

Hair loss in women can become your Achilles heel. For many women one bout of hair loss that rights itself following pregnancy or an illness reoccurs later when the same or another trigger hits.

If you are suffering sudden hair loss ask yourself what you were doing three months ago. Since hair goes through a three month cycle it is often the case that it was three months ago when your body was stressed that the damage was done.

Whilst some of these causes for hair loss in women may have their own solutions (e.g. changing the medications that are causing your hair loss), there is no absolute cure for hair loss in women available today.

If your hair loss has caused a widening part or hair so thin you can see your scalp through it then there is something you can do about it. Some clever Aussie women have developed a product that you can simply shake in to cover up thinning hair instantly. No need to look like you have thinning hair. That product is Boost N Blend™ - an instant, easy to apply hair loss concealer designed by women, for women. The results speak for themselves. The photo on the right was taken just after a few shakes of Boost N Blend™

 

Causes of hair loss in women

Read more about Boost N Blend™ here   |   Read Boost N Blend™ reviews here

 

[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4828511/

[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5397031/

[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6380979/