Perte de cheveux

Hair Loss

Causes, Types, Treatment and Therapy

La perte de cheveux peut affecter le cuir chevelu ou, dans certains cas, l’ensemble du corps. Elle peut être temporaire ou permanente, et ses causes vont des facteurs génétiques aux problèmes de santé sous-jacents ou aux facteurs environnementaux.

Quelles sont les causes de la perte de cheveux ?

La perte de cheveux survient lorsque les nouveaux cheveux ne remplacent pas ceux qui sont tombés. En moyenne, une personne perd entre 50 et 100 cheveux par jour, ce qui fait partie du cycle naturel de croissance des cheveux. Cela passe généralement inaperçu en raison de la repousse simultanée. Cependant, lorsque cet équilibre est perturbé, un éclaircissement visible ou une calvitie peut survenir.

Les causes les plus courantes de la perte de cheveux incluent :

La génétique (calvitie héréditaire)
Les changements hormonaux
Les conditions médicales
Les médicaments ou traitements
Le stress ou les traumatismes
Les carences nutritionnelles

Chez Advanced Hair Clinics, nous proposons des solutions complètes adaptées aux besoins de chaque patient, que l’objectif soit d’arrêter la perte de cheveux, de restaurer les cheveux perdus ou simplement de mieux comprendre la condition.

The Life Cycle of Hair

La perte de cheveux est un processus naturel et continu. Chaque follicule pileux suit son propre cycle de vie unique, qui peut être influencé par des facteurs tels que l’âge, la génétique, l’état de santé, les hormones et le mode de vie. Le cycle complet de croissance des cheveux dure généralement entre 2 à 7 ans et se divise en quatre phases principales :

Phase anagène (Phase de croissance)

C’est la phase active de la croissance des cheveux, pendant laquelle le follicule pileux produit de nouvelles cellules et le cheveu s’allonge.

Durée : 2 à 7 ans
Environ 80 à 90 % des cheveux de votre cuir chevelu sont dans cette phase à tout moment.

Phase catagène (Phase de transition)

C’est une courte phase de transition qui marque la fin de la croissance active des cheveux.

Les follicules pileux se rétrécissent et la croissance ralentit.
Durée : quelques semaines
Environ 3 % des cheveux sont dans cette phase à tout moment.

Phase télogène (Phase de repos)

Pendant cette phase, le follicule pileux est complètement inactif — le cheveu ne pousse plus mais reste attaché.

Durée : 2 à 4 mois
Environ 6 à 8 % des cheveux sont dans cette phase de repos à tout moment.

Phase exogène (Phase de chute)

À la fin de la phase télogène, le cheveu se détache et tombe naturellement du follicule.

Cette phase est responsable de la perte quotidienne de 50 à 100 cheveux, ce qui est parfaitement normal.
Une fois qu’un cheveu est tombé, le follicule entre à nouveau dans la phase anagène, recommençant ainsi le cycle.

Pourquoi le cycle capillaire est important

Un cycle sain et ininterrompu maintient une densité capillaire constante. Cependant, les perturbations — dues au stress, à la maladie, aux déséquilibres hormonaux ou à la prédisposition génétique — peuvent raccourcir la phase de croissance ou prolonger la phase de repos, entraînant un éclaircissement visible ou une perte de cheveux.

Comprendre le cycle de vie des cheveux est crucial pour diagnostiquer et traiter différents types de perte de cheveux. Chez Advanced Hair Clinics, notre équipe utilise des méthodes de diagnostic avancées pour évaluer l’état de vos cheveux et recommander les traitements les plus efficaces en fonction de la cause sous-jacente et de la phase de perturbation.

Heredity (Androgenetic Alopecia)

Causes of Hair Loss

Hair loss can be triggered by a variety of factors—genetic, medical, hormonal, or lifestyle-related. Understanding the underlying cause is essential for selecting the right treatment and achieving effective results.

Heredity (Androgenetic Alopecia)

Hereditary hair loss is the most common form of hair loss worldwide, affecting both men and women. It is not a disease, but a genetically driven condition influenced by hormone levels and age.

In men, it appears as male pattern baldness, typically starting with a receding hairline or thinning at the crown.
In women, it is known as female pattern hair loss, often visible as overall thinning or widening of the parting.

The genetic predisposition leads to a gradual shrinkage of hair follicles, eventually causing hair to stop growing. While the exact inheritance pattern is not fully understood, both maternal and paternal genes may contribute.

Medical Conditions

Medical Conditions

Several illnesses and conditions can disrupt the hair growth cycle:

Autoimmune diseases (e.g., alopecia areata, lupus)
Chronic illnesses (e.g., diabetes, thyroid disorders)
Nutritional deficiencies (e.g., iron-deficiency anemia)
Scalp disorders (e.g., psoriasis, dermatitis, fungal infections, folliculitis)

If you're experiencing hair loss alongside other symptoms, medical evaluation is essential to identify and treat the underlying health issue.

Medications & Treatments

Medications & Treatments

Hair loss can be a side effect of various medications, including those for:

Cancer (chemotherapy, radiation)
Depression and anxiety
High blood pressure
Heart disease
Arthritis and gout
Acne
Hormonal disorders

Anabolic steroids, commonly used in fitness training, can also contribute to hair thinning. In most cases, hair growth resumes after stopping the medication, but always consult your physician before making any changes to prescribed treatment.

Hormonal Imbalances

Hormonal Imbalances

Hormonal fluctuations can significantly impact hair health:

Thyroid disorders (hypothyroidism or hyperthyroidism) can alter the hair growth cycle.
Pregnancy, postpartum, and menopause can lead to temporary but intense hair shedding.
Polycystic Ovary Syndrome (PCOS) can increase androgen levels in women, contributing to thinning hair.
Stopping birth control pills may also trigger temporary hair loss due to sudden hormonal changes.

Balancing these hormones through proper treatment can restore normal hair growth.

Testosterone & Dihydrotestosterone (DHT)

Testosterone & Dihydrotestosterone (DHT)

Dihydrotestosterone (DHT) is a powerful derivative of testosterone, created by the enzyme 5-alpha reductase. In individuals genetically sensitive to DHT:

Hair follicles gradually shrink.
Hair becomes thinner, more brittle, and falls out sooner.
New hair grows more slowly—or not at all.

DHT levels tend to be 3x higher in the frontal scalp than in the back, explaining common baldness patterns. Lifestyle choices such as anabolic steroid use, creatine supplementation, or intense weightlifting can increase DHT production, accelerating hair loss in genetically predisposed individuals.

Stress & Psychological Factors

Stress & Psychological Factors

Both physical and emotional stress can trigger hair loss by disrupting the natural growth cycle:

Telogen Effluvium: A stress-related condition where hair prematurely enters the resting phase, causing excessive shedding.
Common triggers include:
- Surgery or serious illness
- Major life events (divorce, job loss, bereavement)
- Emotional trauma or chronic anxiety

Trauma, Burns & Traumatic Alopecia

According to research (e.g., Harvard University studies), elevated cortisol levels—the body’s main stress hormone—can keep hair follicles in the resting phase, preventing growth and leading to shedding. The good news: stress-related hair loss is usually temporary, and hair often regrows once the stress is managed.

Trauma, Burns & Traumatic Alopecia

Localized Hair Loss: Physical injuries or thermal burns to the scalp, face, or body can permanently damage hair follicles, leading to irreversible hair loss in the affected area.
Traction Alopecia: Repeated tension from tight hairstyles—such as high ponytails, buns, braids, or hair extensions—can weaken follicles over time and cause hair to fall out.
Trichotillomania: An impulse-control disorder in which individuals unconsciously pull or pluck their own hair—often triggered by stress or anxiety. This behavior can start in childhood or adolescence and, if prolonged, may result in permanent loss of hair on the scalp, eyebrows, eyelashes, or beard.

Nutrition & Diet

Nutrition & Diet

Nutrient Deficiencies: Inadequate intake of proteins, essential fatty acids, vitamins (for example, biotin and vitamin D), and trace minerals like iron and zinc can disrupt the hair growth cycle.
Crash Diets & Eating Disorders: Rapid weight loss or chronically restrictive diets may trigger diffuse shedding (telogen effluvium) as the body diverts limited resources away from non‑vital functions such as hair production.
Reversible Condition: Most diet‑related hair loss improves once balanced nutrition is restored—incorporating lean proteins, healthy fats, whole grains, fruits, and vegetables.

Environmental Factors

Environmental Factors

Pollution & Particulate Exposure: Airborne pollutants and fine dust can clog follicles and disrupt scalp health.
Sun & Water Damage: Prolonged UV exposure, frequent swimming in chlorinated pools or saltwater, and contact with acidic rain can weaken hair shafts and accelerate breakage.
Preventive Measures: Wearing protective headgear, rinsing hair promptly after swimming, and using gentle, pH‑balanced shampoos can help mitigate environmental stressors.

Aging

Aging

Natural Thinning: As we grow older, the hair growth cycle gradually shortens, and follicles produce finer, thinner strands.
Hormonal Shifts: Age‑related changes—especially in estrogen and testosterone levels—can reduce hair density. In women, this process often becomes more noticeable after menopause.
Management Strategies: Regular scalp care, targeted treatments, and, in some cases, minimally invasive transplant procedures can help maintain hair volume and health throughout the aging process.

Pathological Forms of Hair Loss

Androgenetic Alopecia: The most prevalent form of hair loss, primarily driven by genetic predisposition and hormonal imbalances. It affects both men and women and typically progresses gradually over time.
Alopecia Areata: An autoimmune condition in which the body’s immune system mistakenly targets and attacks hair follicles, leading to patchy or complete hair loss in affected areas.
Diffuse Alopecia (Telogen Effluvium): Characterized by sudden and widespread thinning of hair, this type is often triggered by physical or emotional stress, illness, or hormonal changes. It is usually reversible once the underlying cause is addressed.
Cicatricial Alopecia (Scarring Alopecia): A less common but permanent form of hair loss resulting from the destruction of hair follicles due to inflammation. It may stem from internal factors like lichen planopilaris or external causes such as burns, trauma, or severe infections.

Hair loss treatment and management

Treatment and Therapy for Hair Loss

Hair loss treatment can be divided into two broad categories: conservative treatment , which includes medication, and surgery

Medications for Hair Loss Treatment

Medications, as well as some products, can also help slow down or prevent hair loss.

Minoxidil, which prolongs the anagen phase of hair, has proven to be one of the most effective pharmaceutical substances against hair loss.
Topical application of corticosteroids to the scalp aimed at combating inflammation that causes hair follicle degeneration. Non-specific treatment is mainly applied in cases of hair loss of unclear etiology, where there is no causal treatment, such as in cases of diffuse, scarring, or alopecia areata.
Anti-hair loss products, such as shampoos, lotions, conditioners, serums with active ingredients and natural herb extracts that are dermatologically tested.

Other Conservative Treatments

Autologous hair mesotherapy, also known as “autologous growth factors” hair loss treatment, is a new, promising treatment based on harnessing the patient’s own healing and growth forces.
LLLT laser therapy aims to improve cases of androgenetic and diffuse alopecia by improving blood circulation and hair nutrition. However, it’s more effective in combination with other treatments, and its effectiveness varies depending on individual hair loss characteristics. It’s not the ideal solution for hair loss due to increased testosterone levels.

Surgical Treatment

Hair transplantation is an advanced surgical procedure that offers a long-term solution to hair loss. The latest FUE (Follicular Unit Extraction) technique ensures a minimally invasive approach with permanent, natural-looking results. This modern method effectively restores hair density and aesthetics, providing a lasting resolution to thinning or balding areas.

Dietary Supplements for Hair Loss

As part of conservative treatment for hair loss, various supportive products are commonly used—such as shampoos, lotions, ampoules enriched with nutrients, and dietary supplements containing vitamins, trace elements, and amino acids.

While the overall effectiveness of these products remains a topic of debate, a well-balanced diet plays a key role in maintaining healthy hair. Nutrition rich in plant-based fibers, B-complex vitamins, essential minerals like zinc, and natural ingredients such as aloe vera is believed to support optimal hair health and nourishment.

Diagnosing Hair Loss: A Specialist’s Role

Accurate diagnosis of hair loss is essential and should always be performed by a dermatologist who specializes in hair disorders. Since hair loss can stem from a wide range of causes, identifying the underlying issue is crucial to selecting the right treatment approach.

A thorough diagnosis will determine whether your hair:

Falls out gradually or suddenly
Appears weak or brittle
Can regrow without intervention
Needs medical treatment to regrow
Requires immediate action to prevent permanent loss

Diagnostic Tests

To further investigate the cause of hair loss, the dermatologist may recommend one or more of the following tests:

Blood Test
Detects underlying medical conditions, vitamin deficiencies, or imbalances that may be contributing to hair loss.
Pull Test
Involves gently pulling a group of hairs to assess how many are shed, helping determine the severity and progression of hair loss.
Scalp Biopsy
A small sample of scalp tissue or hair is examined to identify infections or skin diseases that may be causing hair loss.
Microscopic Hair Examination (Trichogram)
Uses a special microscope to analyze the hair shafts for structural abnormalities or disorders.

Phototrichogram
An advanced diagnostic technique using a micro-camera and specialized software to measure hair density, monitor thickness, and evaluate response to treatment over time.
Genetic Testing
Identifies specific genetic markers linked to androgenetic alopecia, allowing for early diagnosis and personalized treatment plans.

Initial Assessment

Before confirming a diagnosis, the dermatologist will begin with a comprehensive physical examination. You will be asked about:

Your dietary habits
Medical history
Family history of hair loss
Hair care practices

Hair Care Tips to Help Prevent Hair Loss

Practicing proper hair care can significantly support the prevention and management of hair loss. Here are some key recommendations:

Be Gentle When Brushing and Styling
Avoid pulling or tugging on your hair, especially when it’s wet and more fragile. Use a wide-toothed comb to minimize breakage and reduce hair stress during detangling.
Limit Heat and Styling Tools
Excessive use of flat irons, curling wands, and blow dryers can weaken the hair shaft. Try to minimize heat styling and avoid tight hairstyles that put tension on the roots, such as ponytails or braids. Limit the use of clips, pins, and hair ties that may damage fragile strands.

Review Your Medications and Supplements
Some medications and nutritional supplements can contribute to hair loss. Consult your doctor to identify any such side effects and discuss alternatives if needed.
Explore Medical Treatments
Talk to your dermatologist about clinically proven treatments like minoxidil or autologous hair mesotherapy, which can help stimulate hair growth and strengthen existing hair.
Protect Your Hair from UV Exposure
Prolonged exposure to sunlight and other sources of ultraviolet radiation can weaken hair fibers. Consider wearing a hat or using hair products with UV protection when outdoors.
Quit Smoking
Research indicates a link between smoking and increased hair loss, particularly in men. Quitting smoking may not only improve your overall health but also benefit your hair.
Use Mild, pH-Balanced Shampoos
For individuals with sensitive, thin, or hereditary hair loss, gentle shampoos with a neutral pH—suitable for daily use—are generally recommended to reduce scalp irritation and preserve hair health.

Why Choose Us

Advanced Hair Clinics est un centre de premier plan spécialisé dans le diagnostic et le traitement personnalisés de la perte de cheveux. Avec cinq récompenses internationales reconnaissant notre excellence et des milliers de patients satisfaits dans le monde entier, nous avons bâti une réputation dans la fourniture de solutions de restauration capillaire sûres, efficaces et innovantes.

Notre approche est entièrement adaptée aux besoins de chaque individu, garantissant les plus hauts standards de soins et des résultats durables.

Si vous êtes confronté à des problèmes de perte de cheveux, n’hésitez pas à nous contacter — votre parcours vers des cheveux plus sains et plus fournis commence avec nous.

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FAQs

Frequently Asked Questions

How Is Hair Loss Diagnosed?

Hair loss diagnosis should always be carried out by a qualified dermatologist. In cases of androgenetic alopecia, diagnosis typically relies on:

A history of onset after puberty
Gradual thinning in specific areas of the scalp
A family history of similar hair loss

At Advanced Hair Clinics, diagnosis is enhanced using a trichogram, performed with a high-resolution microcamera and advanced software.

We utilize Follysis, a state-of-the-art diagnostic imaging and digital analysis tool. It provides one of the most accurate assessments available, measuring hair density and strand thickness in different scalp areas and monitoring treatment outcomes with precision.

In more complex cases such as alopecia areata or cicatricial alopecia, further testing may be required. This can include:

Blood tests (e.g. for hormones, iron, vitamins, minerals)
Punch biopsy of the scalp for a detailed microscopic evaluation and differential diagnosis

Why Does Hair Loss Occur?

Hair growth follows a natural cycle of three phases:

Anagen phase – active growth
Catagen phase – transitional phase
Telogen phase – shedding phase

Hair loss often occurs when the anagen phase shortens, causing hairs to prematurely enter the telogen phase—resulting in telogen effluvium, a type of diffuse hair loss affecting the entire scalp. Common triggers include:

Childbirth
Chronic infections
Certain medications

Hair loss may also result from scalp conditions such as fungal infections, folliculitis, or inflammatory skin diseases. Additionally, thyroid disorders (hypo/hyperthyroidism), hyperparathyroidism, and other chronic illnesses can lead to thinning hair.

Other contributors include:
Chemotherapy or radiation therapy

Hormonal fluctuations, especially in women during pregnancy, breastfeeding, menopause, or due to menstrual irregularities or polycystic ovary syndrome (PCOS)

These types of hair loss are often reversible once the underlying cause is treated.

On the other hand, localized and often permanent hair loss can occur due to traumatic alopecia, resulting from injuries, scars, or burns affecting the scalp or face.

How Can I Tell if My Hair Loss Is Pathological?

Pathological hair loss is usually characterized by complete hair loss in distinct areas and includes conditions like:

Alopecia areata (patchy or spot baldness)
Cicatricial alopecia caused by injuries, burns, or inflammatory conditions like follicular lichen planus or lupus erythematosus

These forms of hair loss can appear anywhere on the scalp, including areas normally resistant to thinning, and may progress unpredictably. In rare and severe cases—such as alopecia totalis or alopecia universalis—hair loss can extend to the entire scalp, face, or even entire body.

Though more dramatic in appearance, pathological hair loss is relatively rare, accounting for less than 10% of all alopecia cases, with androgenetic alopecia remaining the most common form.

Does Modern Lifestyle Affect Hair Health?

Yes, modern lifestyle factors play a significant role in the health of your hair. Chronic stress, emotional strain, and daily exposure to pollution, dust, and ultraviolet (UV) radiation can all contribute to hair weakening and loss. Additionally, frequent contact with chlorinated pool water or seawater may damage the hair shaft, leading to increased breakage and dryness.

Nutritional deficiencies are another major contributor. A lack of essential nutrients—particularly proteins, iron, zinc, and vitamins—can intensify hair loss. Fortunately, maintaining a balanced diet rich in these nutrients can help restore hair health and, in some cases, reverse hair thinning.

Can Intense Hair Styling Lead to Hair Loss?

Yes. Excessive styling and certain hairdressing practices can cause a condition known as traction alopecia. This type of hair loss results from constant tension on the hair follicles due to tight hairstyles (such as ponytails, braids, or buns), hair extensions, or aggressive brushing. Over time, this repeated pulling can lead to permanent hair loss if not addressed early.

What Is LLLT Treatment and How Effective Is It?

Low-Level Laser Therapy (LLLT) is a non-invasive hair loss treatment that uses low-intensity laser light to stimulate hair follicles. It is often considered by individuals seeking a non-injectable, pain-free alternative to other therapies. LLLT may show moderate effectiveness in certain cases, particularly in hormonal-related hair loss such as postpartum shedding or menopausal thinning. However, it does not match the proven efficacy of treatments like autologous hair mesotherapy, which involves injecting growth factors directly into the scalp.

Moreover, LLLT is not effective for advanced stages of hair loss, as it cannot regenerate lost follicles. It is best suited for early intervention or as part of a broader treatment plan in mild to moderate cases.

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