A hair shedding phase is a wave rather than a permanent state. It happens when more hairs than usual move into the resting part of the growth cycle at once, normally two to four months after a trigger such as illness, childbirth, surgery, a crash diet, low iron or a thyroid change. It typically runs three to six months and then eases. What you do during the wave decides how much hair you still have when it ends.

How much hair loss is actually normal?

The figure you will see everywhere is 50 to 100 hairs a day, and it is broadly right, but it is close to useless on its own. You have roughly 100,000 hairs on your head and each one is on its own independent clock, so a hundred leaving on a Tuesday is unremarkable. The number that matters is not the absolute count. It is the change from your own normal.

That is also why counting is a trap. People who start counting hairs find more hairs, because they start looking in places they never looked before, and the anxiety of the count makes every strand feel like evidence. A better measure is circumstantial: is the plughole worse than it was three months ago, is your ponytail thinner to hold, are you clearing the brush more often than you used to.

The other thing worth knowing is that shedding is naturally lumpy. Hair does not fall at a constant rate. If you wash twice a week, the hairs that were already detached have been sitting in place for three or four days, so wash day looks alarming and the days between look fine. Nothing is wrong. You are just collecting three days of loss in one go.

Is it hair loss, hair shedding or hair breakage?

This is the single most useful distinction on this page, because three different problems look almost identical in the sink and need almost opposite responses. Hair loss means the follicle itself is affected, as in androgenetic alopecia or alopecia areata: a widening parting, thinning at the crown or temples, or patches, developing gradually over months or years and not tied to a single event. Hair shedding means the growth cycle has been disturbed and too many hairs have released at once, which is what a hair shedding phase is, and it is usually temporary. Hair breakage means the follicle is fine and the fibre is snapping mid shaft. The table below separates the last two, which are the pair people most often confuse, and if what you are seeing is a fixed pattern rather than a wave, that is hair loss and belongs with your GP. Getting it wrong wastes months. Someone with breakage who buys a scalp product is aiming at the wrong end of the hair, and someone with a true shed who blames their straighteners will not find the actual trigger.

It is entirely possible to have both at once, and in practice most people in a hair shedding phase do. The shed thins the overall density, and the anxiety about it leads to more brushing, more checking, more tying it back tightly so it looks fuller, and all of that adds breakage on top. If you can only fix one thing, fix the breakage, because it is the half that is fully within your control.

How long does a hair shedding phase last?

Most shedding waves that follow a single identifiable trigger run a fairly predictable course. The trigger happens, nothing appears to change for two to four months, then the shedding starts, runs for around three months, and eases. The delay at the front is the reason people so often blame the wrong thing, because by the time hair starts falling the actual cause is a season in the past and something more recent gets the credit.

What are the common triggers worth checking?

Because of the lag, the useful question is never what changed last week. It is what changed three to four months ago. Cast your mind back a season and look for any of these:

• Illness with a fever, including a bad flu or a COVID infection.
• Sudden or steep weight loss, or a spell of eating much less than usual.
• Low iron, which is common in women who menstruate and easy to check with a blood test.
• Thyroid changes, in either direction.
• A major stressor, bereavement, a move, a divorce, a job loss.
• Having a baby, which reliably produces a shed a few months afterwards.
• Starting or stopping hormonal contraception, which is a conversation for your GP.
• Surgery or a general anaesthetic.

If one of those lines up with a three to four month lead time, you have very likely found your answer, and the answer usually is that it will pass. If nothing lines up, or the shedding has run past six months, that is worth taking to your GP. A blood test for iron, ferritin, thyroid and vitamin D is inexpensive and answers a lot of questions that guesswork cannot. There is more on the mechanism in our guide to what causes telogen effluvium, and if you are not sure the pattern fits at all, working out your cause is the better starting point.

What should you actually do during a hair shedding phase?

Here is the honest framing. You cannot talk a follicle out of a cycle it has already entered. What you can do is make sure that the hair still attached to your head stays attached, because during a wave you are losing hair at both ends: the shed you cannot control, and the breakage you can. Cutting the breakage half is not a consolation prize. When density is already down, every strand you keep is doing visible work.

Handle wet hair as the fragile thing it is

Hair is at its weakest when soaked, because water swells the strand and the internal bonds that give it strength are temporarily disrupted. Brushing hard at that point is where a great deal of avoidable loss happens. Squeeze the water out rather than rubbing, use a microfibre towel or an old cotton T shirt instead of a bath towel, and if you detangle wet, do it with conditioner still in and a wide tooth comb, starting at the ends and working upward in short sections.

Loosen everything

Tight ponytails, tight buns and anything that pulls at the hairline apply constant tension to follicles that are already having a hard time. This matters more than most people think, because unlike a shed, tension damage at the hairline can become permanent if it goes on for years. If you can feel your hairstyle, it is too tight. Swap thin elastics for a soft fabric tie, vary where you put the ponytail so the same hairs are not always taking the strain, and let it down in the evenings.

Turn the heat down before you turn to products

Most people can drop their straightener from 210°C to about 180°C and see no difference in the result, while removing a meaningful amount of daily damage. Always use a heat protectant, let hair dry to at least eighty percent before any hot tool touches it, and consider whether you need heat on the days you are staying in.

Change one thing at a time

This is the rule people break most often and regret most. In a panic it is tempting to start a new shampoo, a supplement, a scalp oil and a diet in the same week. Three months later you cannot tell what helped, what did nothing, and what made it worse, and you will not be able to repeat the good part. Give any single change a fair run of about three months, which is the shortest window in which hair can honestly show you anything.

Take a photograph now

Same spot, same light, same parting, once a month. Memory is a terrible instrument for judging hair, because you compare today against an idealised version of last year. A photo compares today against an actual February. It is also the single most useful thing you can put in front of a GP.

Does what you eat make a difference?

It makes a difference at the margins, and only if you are short of something. Hair is largely protein, and it is a tissue the body is entirely willing to deprioritise when supplies are tight, which is why undereating shows up in hair before it shows up almost anywhere else. If you are eating enough and eating varied, adding more of a nutrient you already have plenty of will do nothing at all.

The ones actually worth checking with your GP are iron and ferritin, vitamin D, B12 if you eat little or no meat, and thyroid function. Ferritin is the one most often missed, because a standard iron result can look acceptable while your stores are low. Aim for protein at every meal rather than concentrating it all in the evening, since hair building happens around the clock and a single large serving cannot be banked.

Be wary of any supplement sold on the promise of new growth. Nutrients help when they correct a genuine shortfall. They are not a lever you can pull for extra hair when nothing was missing, and megadoses of some, including selenium, can cause shedding in their own right.

Where do hair care products honestly fit?

Straight answer: no shampoo, conditioner or spray changes what your follicles are doing. Anyone telling you otherwise is selling you something on a claim they cannot support. What a good cosmetic routine does is protect what you have, so that the hair which survives the wave stays long, thick-looking and intact rather than snapping off at the midlengths. During a shed, that is genuinely worth having, and it is the honest job these products do.

Condition Me® Conditioner

The one that matters most during a shed, because detangling is where avoidable loss happens. Cholesterol, shea butter and hydrolysed lupine protein give the comb something to slide through, so sections come apart instead of snapping. Use it every wash and leave it on while you comb.

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Protect Me® Heat Protection Spray

If you are still using hot tools during a shedding phase, this is not optional. Protects to 230°C and doubles as a leave-in detangler, so the brush moves through damp hair with less resistance. Lighter than a cream, which matters when density is already down.

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Grow Me® Shampoo

A sulphate-free daily wash with biotin, caffeine, rosemary and niacinamide. It cleans without stripping, which matters if you have started washing more often to feel in control. A gentle base that leaves hair feeling thicker and looking fuller.

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Watermans is a UK family business and has sold over 5 million bottles since 2012. Every product is vegan, cruelty free and made in the UK.

When should you stop managing it yourself and see your GP?

Most shedding waves do not need a professional, but some do, and the ones that do are worth catching early. Speak to your GP if any of these apply:

• The shedding came on suddenly and heavily rather than building up.
• You can see smooth, round bald patches rather than an even thinning.
• Your scalp is sore, itchy, scaly, red or scarred looking.
• The shedding has continued past six months without easing.
• Your parting is visibly widening rather than the whole head thinning evenly.
• It comes alongside fatigue, weight change, irregular periods or unusual facial hair.
• You are losing hair from your eyebrows or eyelashes as well.

Take your monthly photographs with you and ask specifically about iron, ferritin, thyroid and vitamin D. If you would like to protect the hair you have while you work through all of this, our guide to the habits that protect your hair covers the day to day routine in more depth.

Frequently asked questions

How many hairs a day is too many?

There is no single number, because it depends on how much hair you started with and how often you wash. Fifty to a hundred a day is the usual guide, but the more useful comparison is against your own normal from a few months ago. A sustained, obvious increase matters. One bad wash day does not.

Is my hair falling out or breaking?

Look at the root end of a fallen hair. A small pale bulb means it completed its cycle and let go. A blunt or frayed end with no bulb means it snapped. Full length hairs point to shedding, short mixed lengths point to breakage, and many people have both at once.

Will the hair grow back?

When shedding follows a one off trigger such as an illness, a stressful period or having a baby, the follicles are still alive and hair usually returns on its own. It takes longer than people expect, because shedding stopping and density returning are separate events roughly a year apart.

Why does it look so much worse on wash days?

Because you are collecting several days of loss in one go. Hairs that detached on Monday and Tuesday stay tangled in place until the water moves them, so a twice weekly washer sees three days of shedding at once and reasonably concludes that washing caused it. It did not.

Should I wash my hair less to lose less?

No. Washing does not cause the loss, it only reveals it, and washing less simply means bigger clumps when you do. It can also leave the scalp less comfortable, which helps nothing. Wash at whatever frequency suits your scalp and handle it gently when you do.

Does brushing make shedding worse?

Gentle brushing removes hairs that had already let go, so it does not add to the total. Aggressive brushing, especially on soaking wet hair, absolutely does add breakage. Use a wide tooth comb on wet hair, start at the ends, and never force through a knot.

Can a shampoo stop a hair shedding phase?

No, and be sceptical of anything that claims it can. A cosmetic product works on the hair you can see, not on the cycle happening under the skin. What a good routine does is reduce the breakage that compounds a shed, which is a genuine and worthwhile job but a different one.

How do I make my hair look fuller while I wait?

A blunt cut reads as thicker than long layers, because the ends all arrive together. Volume at the root does more than length. A slightly different parting covers a widening one. Lightweight products beat heavy oils, which clump fine hair into visible separations and make density look worse than it is.

Is seasonal shedding a real thing?

Yes, mildly. Many people shed a little more in autumn, which is thought to follow a summer peak in hairs entering their resting phase. It is usually a small effect and it settles by itself. It is not an explanation for a heavy, months long wave.

Sources and References

• NHS, Hair loss, on what is normal, common causes and when to see a GP.
• British Association of Dermatologists, Telogen effluvium, on the timeline of a hair shedding phase and typical recovery.
• StatPearls, Androgenetic alopecia, on the follicular pattern that is hair loss rather than shedding.
• NICE CKS, Iron deficiency anaemia, on ferritin testing, one of the commonest findings behind a stubborn shed.
• British Thyroid Foundation, Hair loss and thyroid disorders, on thyroid related hair changes.

The short version

A shedding phase is frightening precisely because it is invisible in its causes and slow in its recovery. A hair shedding phase is visible in its causes and slow in its recovery, so work backwards three to four months to find the trigger. Check whether you are dealing with a shed, breakage or both. Protect the hair you still have from tension, heat and rough handling, because that half is entirely yours to control. Change one thing at a time, photograph it monthly so you are judging a trend rather than a bad morning, and take anything sudden, patchy or long running to your GP.

If you want a gentle routine to carry you through it, the Condition Me Conditioner is the place to start, because detangling is where the avoidable loss happens.