Sudden Hair Shedding (Telogen Effluvium) in London 2026. The Doctor-Led Diagnostic Pathway
Sudden, alarming hair shedding, hair coming out in handfuls in the shower or on the brush two to three months after a stressful event, is usually telogen effluvium, and the good news is that it is typically temporary and recovers when the cause is found and addressed. It happens when a shock to the system, a severe illness or high fever, childbirth, major stress, surgery, a crash diet, a new medication, or an untreated problem such as iron deficiency or thyroid disease, pushes an unusually large number of hairs into the shedding phase at once, so the shedding you see now reflects something that happened weeks or months ago. Because the drivers are so often treatable, the single most useful step is a doctor-led assessment and blood panel to identify the trigger, rather than reaching straight for a treatment. At The London PRP Clinic by The Wellness in Marylebone, a GMC-registered doctor takes the history, runs the diagnostic blood panel, treats the cause, and supports regrowth with PRP and exosomes where that is appropriate. Care is doctor-led and priced within London's premium tier. Fees are discussed further down this page.
Medically reviewed by a GMC-registered doctor at The London PRP Clinic by The Wellness. Last updated August 2026.
Message a GMC-registered doctor on WhatsAppor email team@thewellnesslondon.com or call +44 20 3951 3429.
At a glance
Telogen effluvium is diffuse, temporary shedding that usually follows a trigger by two to three months and recovers once the cause is treated, which is why the pathway begins with a doctor-led diagnostic blood panel rather than a treatment. PRP is from £545 a session and hair exosomes from £445 where regrowth support is appropriate, and the diagnostic panel can be priced at consultation. Every treatment is delivered by a GMC-registered doctor.
Pricing sits within London's premium doctor-led tier, because the diagnosis and the doctor are part of what you are paying for. Flagship Harley Street and Mayfair hair clinics commonly charge £600 to £850 or more per PRP hair session, with the wider London market running roughly £300 to £800, and peers including the Wimpole Clinic on Harley Street and PRP London Clinic on Cavendish Square. What separates our pathway is that we find the cause before we treat, rather than selling injections for shedding that will settle on its own once the trigger is addressed.
What telogen effluvium is, and why it happens
Hair grows in cycles, with each follicle spending years growing and then a few months resting and shedding before regrowing. Telogen effluvium occurs when a large proportion of hairs are pushed into the resting and shedding phase at once, so that two to three months later they fall together, producing the sudden diffuse thinning across the whole scalp that frightens people into thinking they are going bald. They are not; the follicles are alive and the hair regrows once the trigger passes.
The triggers are the key, because they are so often identifiable and treatable. A high fever or severe infection, childbirth, a major operation or general anaesthetic, significant emotional or physical stress, rapid weight loss or a very restrictive diet, starting or stopping certain medications, and untreated iron deficiency or thyroid disease are the common ones. The delay between the trigger and the shedding is why the cause is not always obvious, and why a careful history that looks back two to three months is part of the assessment.
Why diagnosis comes first
Because telogen effluvium usually recovers on its own once the trigger is addressed, the most valuable thing a clinic can do is find and treat the cause, not sell a course of injections for shedding that would settle anyway. Chasing the follicle while missing an untreated iron deficiency or thyroid problem underneath treats the symptom and misses the point, which is exactly why so many people spend money on treatments that do not work before anyone tests them.
Diagnosis also separates telogen effluvium from the conditions it can be confused with, which matters because they need different management. Female or male pattern hair loss is gradual and follows a pattern rather than a sudden diffuse shed; alopecia areata produces distinct bald patches; and a scarring alopecia needs urgent specialist care. A doctor-led assessment tells these apart, so the plan fits the actual problem. Getting the diagnosis right is what makes everything that follows worthwhile.
Want to understand why your hair is shedding? Ask our doctors on WhatsAppor email team@thewellnesslondon.com.
What the diagnostic blood panel looks for
The panel checks the treatable drivers that cause or worsen shedding: ferritin and iron studies, a full thyroid panel, vitamin D, B12 and folate, and, where the history warrants, other markers. Ferritin sits at the centre of this, because low iron stores are one of the commonest and most correctable causes of diffuse shedding, and they drain the hair long before anaemia shows on a standard blood count. Thyroid dysfunction and significant nutritional gaps are the other frequent culprits.
Correcting what the panel finds is often the treatment. Restoring iron stores, addressing a thyroid problem or repairing a nutritional deficiency allows the hair cycle to normalise and the hair to regrow, sometimes without any hair-directed treatment at all. Results are read against your history by a doctor, and the plan follows the findings, so the shedding is addressed at its source rather than papered over. This diagnostic step is the one most clinics skip and the one that most often solves the problem.
Who is a good candidate for treatment?
Most people with telogen effluvium need the cause found and treated, reassurance that the follicles are alive, and time, rather than injections. Where PRP and exosomes add value is in supporting and speeding regrowth once the trigger has been addressed, in more prolonged or slow-recovering cases, or where telogen effluvium sits alongside early pattern hair loss that would benefit from treatment in its own right. That is a judgement made after the diagnosis, not before.
Poor use of treatment is injecting a scalp whose shedding will settle on its own once an untreated deficiency is corrected, which is why the assessment comes first. Where the picture is a scarring alopecia, alopecia areata or advanced pattern loss, the plan is different and, in some cases, a specialist referral is the right step. We assess all of this before recommending anything, because setting the right expectation, including that recovery is often a matter of treating the cause and waiting, is what makes the advice trustworthy.
What sudden hair shedding assessment and treatment costs in London
The diagnostic panel is priced at consultation, PRP is from £545 a session and hair exosomes from £445 where regrowth support is appropriate, with 10 percent off a course of three. Pricing aligns with London's premium doctor-led clinics rather than undercutting them, because the diagnosis and the doctor are part of what you are paying for.
Across central London in 2026, flagship Harley Street and Mayfair hair clinics commonly charge £600 to £850 or more per PRP hair session, with the wider market running roughly £300 to £800, and named peers including the Wimpole Clinic and PRP London Clinic on Cavendish Square. The important difference here is that for straightforward telogen effluvium, the answer is often the assessment and treating the cause rather than a course of injections at all, and we would rather tell you that than sell you a package your hair does not need.
What happens across the pathway
The pathway runs in clear stages. Stage one: a doctor-led consultation and history that looks back over the previous months for a trigger, with a scalp examination and the diagnostic blood panel. Stage two: results are interpreted and the cause treated, whether that is iron, thyroid, a nutritional gap or a medication review. Stage three: where regrowth support is appropriate, a PRP course, usually three sessions four to six weeks apart, with exosomes added where indicated. Stage four: review and, in most cases, reassurance as the hair recovers.
For many people the pathway ends at stage two, with the cause treated and time allowed for recovery, which is the honest and appropriate outcome. Where treatment is used, each PRP session takes about forty-five to sixty minutes, with a small blood draw spun on a dual-spin centrifuge to four to six times baseline platelet concentration before delivery across the scalp. The plan integrates with primary care at The Wellness, so the medical and the hair-directed sides are managed together.
When will I see results?
Telogen effluvium usually recovers over three to six months once the trigger is addressed, with the shedding slowing first and new regrowth appearing as short hairs across the scalp, and full density returning over six to twelve months. Because the hair cycle is long, patience is genuinely part of the treatment, and knowing the follicles are alive and the hair is coming back is itself a large part of the relief people are seeking.
Where PRP and exosomes are used to support regrowth, the benefit builds over a course and the following months rather than immediately. We review the response to confirm the recovery is on track and to reassure, and where an underlying deficiency was the driver, its correction is what does most of the work. The key message for most patients is that this is a recoverable condition, and the plan is to remove the cause and let the hair return.
Why we deliver better outcomes for sudden shedding
Because the outcome in telogen effluvium is decided by whether anyone finds the cause, and this is a diagnosis-first, doctor-led clinic built around that. A GMC-registered doctor takes the history that identifies the trigger, runs and interprets the blood panel, treats the deficiency or the thyroid problem underneath, and only then decides whether hair-directed treatment adds anything, rather than injecting first and testing never.
Every doctor on the team has performed at least 100 PRP sessions and completed six or more months of clinical surgical training, hair care sits inside primary care at The Wellness so bloods and treatment are coordinated by the same team, and care is available in English, Arabic, Spanish, French and Dutch. Across our work we report more than 187 five-star reviews. The value here is the diagnosis and the honesty, not a course of injections sold by default.
Frequently asked questions about sudden hair shedding
Why is my hair suddenly falling out? The most common cause of sudden diffuse shedding is telogen effluvium, triggered two to three months earlier by illness, childbirth, stress, a crash diet, a new medication, or an untreated problem such as iron deficiency or thyroid disease. A doctor-led assessment and blood panel identify the trigger.
Will my hair grow back? Usually, yes. In telogen effluvium the follicles are alive and the hair regrows once the trigger is addressed, over three to six months for the shedding to settle and six to twelve months for density to return. A doctor confirms the diagnosis and rules out other causes.
Do I need blood tests? Yes. Iron, thyroid and nutritional problems are common, treatable drivers of shedding, and correcting them is often the treatment. Testing before treating is what prevents money being spent on injections a recovering scalp does not need.
Does PRP help telogen effluvium? For straightforward cases the answer is usually treating the cause and time, not injections. PRP and exosomes can support and speed regrowth in more prolonged cases or where early pattern hair loss coexists, which is a judgement made after diagnosis.
How much does it cost in London? The diagnostic panel is priced at consultation, and PRP, where appropriate, is from £545 a session with exosomes from £445. Flagship Harley Street clinics commonly charge £600 to £850 or more per PRP session, though many people with telogen effluvium need the assessment rather than a course.
Book your consultation today
Take the first step today. Message us on WhatsApp, email team@thewellnesslondon.com, or call +44 20 3951 3429.
In person: The London PRP Clinic by The Wellness, 22 Seymour Street, Marylebone, London W1H 7HY. Opening hours Monday to Friday 8am to 8pm, Saturday 9am to 5pm.
This article is for information and does not replace personal medical advice. Telogen effluvium is usually temporary and recovers when the cause is addressed; persistent or patchy loss needs assessment for other causes. Results vary between individuals. All treatments at The London PRP Clinic by The Wellness are performed by GMC-registered doctors. Reviewed by a GMC-registered doctor, The London PRP Clinic by The Wellness. Last updated August 2026.
References. NHS and British Association of Dermatologists patient information on telogen effluvium and hair loss. Published literature on ferritin, thyroid function and diffuse hair shedding. Published 2026 London pricing for PRP hair treatment.
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