Stress and Hair Shedding, Explained

Yes, stress can make your hair fall out. It usually turns up two to four months after the stressful stretch, not during it, which is why so many women start shedding once life has finally settled and cannot work out what changed. The medical name is telogen effluvium. For most women it is temporary, and the hair grows back.

Here is what is actually happening, how long it lasts, and what helps while you wait.

Can stress really make your hair fall out?

It can. Stress does not attack your hair, it changes the timing of the growth cycle.

Every hair is on its own schedule. Most of your hair is in the growing phase, and only around 10 to 15 percent is resting at any time. Resting hairs are finished. They sit in the follicle for a couple of months, then let go, and a new hair starts underneath.

A big enough shock to the body pushes far more of your growing hairs into that resting phase at once. DermNet NZ, our own New Zealand dermatology resource, calls it excessive shedding of resting hair after a shock to the system.

It is not only emotional stress that does it. Childbirth, illness, surgery, low iron, thyroid problems, going on or off the pill, and not eating enough can all trigger the same response.

Why the shedding starts months later

This is the part that catches everyone out.

Those hairs were pushed into the resting phase back during the hard stretch. The resting phase itself runs a couple of months. Only at the end of it do the hairs release, all together.

So the shed usually begins two to four months after the trigger. You are seeing the fallout from something your body went through a season ago. Which means it often starts right when you are finally feeling better. That is not a sign you are getting worse.

How much shedding is normal?

Most people lose up to about 100 hairs a day, and that is completely normal. During telogen effluvium, Cleveland Clinic puts it at up to around 300 a day.

You do not need to count. One thing worth knowing though: if you wash twice a week, what comes out in the shower is two or three days of shedding arriving at once. It looks alarming even when it is normal, and washing less often does not reduce shedding, it just bunches it up.

How long does it last, and will it grow back?

The heavy shedding usually runs about three to six months once it starts. Visible regrowth generally follows over the next six to nine months, and getting back to your old thickness can take longer again. The ISHRS notes that regaining previous fullness may take 18 months or more.

Slow, but the important part is this: the follicles are not damaged or gone. They are on pause. Once the trigger passes, they start up again.

Those short fluffy hairs that appear along your hairline and part are not frizz. They are the new growth coming through.

What helps while you wait

You cannot speed the growth cycle up. You can make sure nothing else is holding it back.

• Take the load off. Boring, and it is the actual lever. If the stress is still happening rather than behind you, that is the piece that matters most.
• Eat enough, and enough protein. Hair is protein, and it is the first thing your body deprioritises when food is short. Under-eating is a common and often missed trigger.
• Be gentle. Detangle from the ends up, ease off the tight ponytail, turn the heat down, and protect it overnight. We have a whole guide on protecting your hair while you sleep.
• Look after your scalp. It is the skin your hair grows out of and it gets ignored. Keep it clean and massage it. Our Activator Serum is a pre-wash scalp treatment with biotin, rosemary and nettle leaf extract, made for exactly this stretch. It is not a fix for stress, and nothing topical is. It is a way of caring for your scalp while your body catches up, and plenty of women use it with our scalp massage tool to make it easy.

When to see your GP

Book an appointment if the shedding has gone on longer than six months, you are losing hair in patches, your scalp is sore or flaky, or you are also tired, cold, or your periods have changed. Ask about iron and ferritin, vitamin D, B12 and thyroid function. Low iron is very common in New Zealand women and it is one of the most fixable causes on the list.

FAQs

How much hair loss per day is normal?

Up to about 100 hairs a day. In telogen effluvium that can rise to around 300. If you wash twice a week, several days of shedding arrive at once, so the shower always looks worse than the daily number.

How long does stress-related hair loss last?

The heavy shedding usually lasts three to six months, with regrowth following over six to nine months. Anything continuing past six months is worth checking with your GP.

Will my hair grow back after stress?

In most cases yes. The follicles are paused, not lost. If the stress is ongoing the shedding can continue, which is why the stress side matters as much as the hair side.

How long before I see a difference with the Activator Serum?

Hair grows about a centimetre a month, so think in months rather than weeks. Most women use it consistently for three months before judging it.

Your hair is not gone

If you are a few months out from a rough season and finding hair everywhere, this is your body clearing a backlog, not your hair giving up. Be gentle with it, eat properly, get your bloods done if anything else feels off, and look after your scalp.

Have a look at the Activator Serum if you want a simple pre-wash ritual to keep up while your hair finds its way back.

This article is general information, not medical advice. If you are worried about hair loss, please talk to your GP or a dermatologist.