What Causes Matted Hair? I Analysed 1,000+ UK Cases to Find Out

Case Study

We Care About Your Hair. We Save Hair, Not Cut It.

By Vitalii Prisacari, VTCT Skills Level 3 Diploma in Women's Hairdressing, including the Level 4 Hair and Scalp unit, State Registered Graduate Hairdresser, founder of Matted Hair London. Helped 1,000+ people since 2020. Reviewed 1 October 2026.

⚠ IMPORTANT: Keep the mat dry and put nothing on it first, not oil, not conditioner, not a detangler spray. 89% of recorded home attempts on severe mats made the mat denser. Send me a photo first: the 10-minute consultation is free, by phone, WhatsApp or video call, on +44 7902 020201.

Studio: Adenmore Road, Catford, London SE6 4BT | Phone/WhatsApp: +44 7902 020201 | Book: matted.co.uk/contact | Rating: 4.9 out of 5 from 40+ Google reviews | Credentials: 27 verified qualifications

➤ See also: Complete matted hair guide | 300+ question FAQ | 70+ before-and-after results | About the specialist | All 27 credentials

The short answer

Across more than 1,000 clients since 2020, the largest single cause of matted hair is depression, illness and hospital stays, at 42%.

Key Matted Hair Findings at a Glance

Every percentage comes from my own client records: an intake form, a review after the session and, for many, photographs.

If your hair tangles or mats easily with no crisis behind it, causes 2 to 8 are the ones to read, and why does my hair mat so easily covers the everyday version.

The 10 Causes: Quick Summary

42% 13% 10% 9% 8% 7% 6% 4%
Clients Since 2020
42% Depression, illness and hospital stays
13% Wrong washing technique
10% Skipped brushing
9% Low-quality products
8% Social media myths
7% DIY chemical treatments
6% London hard water
4% Sleep friction
0.5% Harmful accessories
0.5% Internal health factors
RankMatted Hair CauseShareCases
1Depression, illness and hospital stays42%~420
2Wrong washing technique13%~130
3Skipped brushing routines10%~100
4Low-quality or harmful products9%~90
5Social media myths and wrong products for type8%~80
6DIY chemical treatments at home7%~70
7London hard water damage6%~60
8Sleep friction and fabric damage4%~40
9Harmful accessories and ties0.5%~5
10Internal health factors0.5%~5

➤ See also: Matted hair restoration service | Book a free assessment

How Did I Collect These Figures?

I collected these figures from my own clients since 2020, at my private studio in Catford, London SE6. Every client went through the same three stages: before, during and after the work. Each case was graded on my own severity scale; the term and the grades are explained on what is matted hair.

Data Collection: Three Stages

Stage 1, assessment before the work starts (about 10 minutes, longer for complex cases): questions about health, products, lifestyle and daily routine, with photos of the hair. Visual exam with photos. Together we built a timeline: when the matting started and what events contributed.

Stage 2, during treatment (from 1 hour to 14 hours or more, depending on the grade; the longest documented case took 36 hours in total, with breaks): I recorded how the hair had matted, how dense it was and how it was built. I also checked for product residue, chemical damage and mechanical wear.

Stage 3, after treatment: an exit form recorded the main cause and any secondary factors. Each client received a tailored prevention plan. Every client also gets follow-up support, so I can check with them that the tangles do not come back.

Sample Profile

  • Total clients: 1,000+
  • Location: Greater London 85%, rest of the UK and abroad 15%
  • Age range: 3 to 74 (median 34)
  • Hair length: 30 cm to 80 cm+
  • Gender: 94% female, 6% male

All records are anonymised under UK GDPR. Clients gave written consent. View examples in the gallery.

➤ See also: Matted hair, defined in the FAQ | Matted hair severity grading

1. Why Do Depression and Illness Cause Matted Hair? 42% of Cases

Most people in this group tell me the same thing: they stopped brushing and did not notice the weeks go by. This group, 42% of my clients and more than 420 people, came to me after a mental health condition (mainly depression and anxiety), a physical illness, or a hospital stay when hair care became impossible.

What Depression-Related Matted Hair Looks Like

Clients in this group usually arrive with what medical texts call plica polonica: dense, compact matting built over weeks or months without brushing. Hair longer than 30 cm left uncombed for two or more weeks often becomes too difficult to fix at home. The mass usually sits at the nape or the back of the head, where pillow friction is highest.

The UK Mental Health Context Behind Matted Hair

Why Depression Leads to Matted Hair: The Chain of Events

  1. Energy drains. The NHS lists lack of energy and neglecting your hobbies and interests among the symptoms of depression. Basic tasks feel impossible, and brushing stops with them.
  2. Depression makes it hard to start anything, even brushing, and the days run together, so clients often do not realise how many weeks have gone by.
  3. Shed hair piles up. The body sheds 50 to 100 strands daily (American Academy of Dermatology). With no brush to take them out, the loose hairs wrap round the ones still growing.
  4. The worse the matting gets, the more daunting it can feel, so for some people it is left even longer.

Three Cases from This Group

Case A: A 28-year-old woman developed post-COVID depression. Hair went uncombed for 6 weeks. Arrived with a 30 cm matted mass at the nape. 6.5 hours of work. Saved without cutting.

Case B: A 45-year-old woman spent 3 weeks in hospital after surgery. Could not lift her arms to brush. Discharged with severe matted hair across the back. The work took 4 hours. Saved without cutting.

Case C: A 34-year-old new mother with postnatal depression. 60 cm+ hair went uncombed for 8 weeks. Most of the hair had matted together into large fused sections. Two sessions totalling 8 hours. Saved without cutting.

If weeks passed and the hair was left while you were unwell, you are in the largest group in my case files. I trained in Mental Health First Aid. Send me one photo on WhatsApp at +44 7902 020201; I usually reply within an hour, and I can come to your home if anxiety or mobility makes travel hard. If you care for a parent or partner, the steps for carers are in matted hair in elderly and dementia care.

If you are having a hard time right now, you can talk to Samaritans (116 123) or Mind (0300 123 3393), free and in confidence.

➤ See also: Matted hair after depression | Is matted hair a sign of depression? | Hair care during depression | Post-depression matted hair restoration | Matted hair after illness or a hospital stay | Home visits across London

2. Can Washing Your Hair Wrongly Cause Matting? 13% of Cases

Scrubbing shampoo in circles through the lengths is the commonest mistake, then washing upside down, rubbing with a towel and leaving product in. Each wash twists more strands together.

The Four Washing Mistakes That Cause Matted Hair

Circular scrubbing (68% of washing-related cases): Rubbing shampoo in circles through the mid-lengths twists the strands round each other, the way wool felts.

Upside-down washing (22%): Flip your head forward and the strands cross every which way, and they stay crossed as the hair dries.

Rough towel-drying (7%): Cotton towels rub against wet hair while the cuticle is fragile, and knots form straight away. Wet hair stretches up to 30% before it breaks.

Incomplete rinsing (3%): Leftover product bonds strands as they dry, building matting with every wash.

The Safe Washing Method That Prevents Matting (10-and-2 Technique)

  1. Put shampoo on your scalp only, not the lengths
  2. Place hands like "10 and 2 on a clock"
  3. Massage the scalp in straight, vertical strokes, never circles
  4. Let lather run down the lengths with water; do not rub
  5. Rinse from roots to ends, following gravity
  6. Pat with a microfibre towel, never rub

    7. This method is for hair that is not matted yet. If a section is already matted, keep it dry and do not wash it first: water tightens the knot. I describe the dry method, step by step, on the page about how I open a severe mat without cutting.

3. What Happens If You Stop Brushing? 10% of Cases

Shed hair stays in. You lose 50 to 100 hairs a day, and without brushing they wrap around the hairs still growing: tangles first, then a knot, and within weeks a mat. By week 4, up to 2,800 loose strands can be caught in the hair.

How Matted Hair Builds Over Time Without Brushing

TimelineTrapped StrandsWhat Happens
Days 1 to 3150 to 300Small snags form: the early stage of matting
Week 1350 to 700Knots begin interlocking
Weeks 2 to 3700 to 2,100Dense clumps; brushing becomes painful
Week 4+1,400+Severe matting; professional help usually needed

Brush at least three times a day: in the morning, at midday when needed, and in the evening, plus before and after washing. Morning and before sleep matter most. Use a flexible-bristle tool. Work from ends upward.

4. Can Hair Products Cause Matting? 9% of Cases

Harsh sulphates (78% of product-related cases): SLS and SLES strip protective oils, leaving cuticles rough: hair grips together and mats.

Heavy non-water-soluble silicones (52%): Build up without clarifying washes, making hair heavy and prone to matting.

Drying alcohols (34%): Pull moisture out fast. Dry, brittle hair catches on itself and mats quickly.

Counterfeit products (12% of this group): Fake Olaplex, Moroccanoil, and Kerastase contain wrong pH levels. UK Trading Standards warns consumers to buy only from authorised retailers.

⚠ A detangler spray does not open a mat: it coats the outside, and nothing should go on a mat first. Olive oil is slippery at first, then glues strand to strand. Coconut oil sets solid below about 24 °C and cements the knot. I do not recommend any consumer product for matted hair. In the studio, slip product goes on only once a section has started to open; my notes on which products help, and when, are on a separate page. Send me a photo first on WhatsApp or call +44 7902 020201.

5. Can Social Media Hair Tips Cause Matting? 8% of Cases

Three tips did most of the damage. Others had picked a product made for a different hair type.

"Oil fixes everything" (31%): Heavy oils on fine hair create matted build-up underneath.

Curly Girl Method taken too far (27%): "Never brush curly hair" taken literally means shed strands pile up, creating hidden matting.

DIY food masks (23%): Egg masks coagulate. Honey makes hair sticky.

Only 23% of clients could accurately name their porosity, density and curl pattern before treatment.

⚠ Before following any social media advice on matted hair, send me a photo on WhatsApp at +44 7902 020201.

6. Can Box Dye or Bleach Make Hair Mat? 7% of Cases

This is the matting that follows box dye, bleach, relaxers and colour stripping done at home. Alkaline chemicals (pH 9 to 14) damage the cuticle and leave hair porous and rough. Too much bleach breaks down the hair structure. Bleached hair mats faster.

During the 2020 and 2021 lockdowns, home box dye and home bleaching became far more common. Chemical-damage matting cases at my studio rose by about half. I explain what each treatment does to the strand on the page about how dye and bleach change hair texture.

7. Does London Hard Water Cause Matted Hair? 6% of Cases

A common pattern: a client moves to London from a soft-water area, and within 3 to 6 months their hair is matting for the first time. Thames Water data shows calcium carbonate levels of 268 to 300 mg/L across SE postcodes (Catford 268, Peckham 274, Charlton 300 mg/L). Mineral build-up leaves the lengths dry and frizzy, and rough strands catch on each other.

Solutions That Prevent Hard Water Matting

  1. Shower filter removes much of the minerals
  2. Chelating shampoo (weekly) strips mineral build-up
  3. Apple cider vinegar rinse (1:4 with water) lowers pH, smooths cuticle
  4. Whole-home water softener prevents the problem at source

8. Can Sleeping On Your Hair Cause Matting? 4% of Cases

Loose hair on a cotton pillowcase rubs against it for a whole night, every night. Cotton grips hair, absorbs oils and creates static.

Five Fixes That Prevent Sleep-Related Matting

  1. Silk or satin pillowcase lets hair slide instead of catching
  2. Loose braid before bed prevents matting while sleeping
  3. Satin bonnet keeps the hair off the pillowcase altogether
  4. Pre-sleep prep: make sure the hair is completely dry, and do not apply any oils, conditioners or products before sleeping; there is a real chance of worsening the matting
  5. Morning check: undo braids, check the roots carefully, comb from the ends upward

9. Can Hair Ties and Clips Cause Matting? 0.5% of Cases

Metal-clasp elastics, tight styles and sharp clips created breakage points that led to small, local mats in 0.5% of cases. Sustained tension from tight styles can permanently damage follicles.

Safe alternatives: spiral ties, silk scrunchies and bands with no metal. Always work from ends to roots to prevent matting.

10. Can Health Problems Change Your Hair and Cause Matting? 0.5% of Cases

In 0.5% of my clients, about 5 people, the cause was inside the body. Thyroid disorders, hormonal changes, nutritional gaps and autoimmune conditions changed the hair's texture from within, and the hair then matted. If you notice a change like this, see your GP.

Iron deficiency (found in around 1 in 5 UK women of childbearing age, according to the National Diet and Nutrition Survey) causes thinning and brittleness that leads to matted hair. If your hair changed texture after starting a new medicine, ask your GP or pharmacist before changing anything.

How Do You Stop Hair Matting Again?

Three habits would have prevented most of the matting I see, and each one is set out below with the causes it covers. They have a limit. Case B could not lift her arms to brush, and when you are ill or in hospital, no one can expect you to brush three times a day.

Three Habits That Prevent 86% of Severe Matted Hair

1. Brush at least three times a day, as set out in cause 3. This one habit covers causes 3 and 8, because it takes shed strands out before they can mat. Cause 1 is where it fails: illness is exactly when the brushing stops.

2. Wash correctly. The 10-and-2 method eliminates cause 2, 13% of cases.

3. Know your hair type and choose matching products. Understanding porosity and curl pattern prevents causes 4 and 5, 17% combined.

The full routine is in the guide to preventing hair from matting.

When Is Matted Hair a Job for a Specialist?

If your fingers cannot get through a section and it feels solid, it is a mat, and a mat needs a specialist.

Of more than 1,000 clients since 2020, 99% were saved without cutting. All of the work is done by hand. I use my fingers, special tools, sprays and products, each only when the hair needs it. The work is dry dematting, and I explain what a session involves on the matted hair removal service in London page.

I hold the VTCT Skills Level 3 Diploma in Women's Hairdressing among 27 qualifications in all, and I am Mental Health First Aid trained. Appointments have no time limit, and you can take breaks whenever you need them.

We Care About Your Hair. We Save Hair, Not Cut It.

How to start:

  1. Free 10-minute consultation by phone, WhatsApp or video call: +44 7902 020201 (confidential)
  2. Photo assessment: send photos of the hair via matted.co.uk/contact. I usually reply within an hour.
  3. Book directly matted.co.uk/contact
Studio: Adenmore Road, Catford, London SE6 4BT, about 5 minutes from Catford Bridge station

Home visits: available across Greater London
Available: Monday to Saturday, 9am to 10pm | Same-day emergency bookings often available
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Price: £100 per hour, with a £100 deposit that comes off the final total, and a flat £200 surcharge if I come to your home