Alopecia Causes: Why Alopecia Happens in Men and Women

Alopecia is not one single condition - it is an umbrella term for Hair Loss that can happen for many different reasons. Noticing more hair on your pillow, in the shower drain, or at your hairline signals that your scalp biology is under stress. The cause can be hormonal, genetic, autoimmune, nutritional, or environmental - and often several triggers combine.

Key takeaways:

• Alopecia refers to any form of hair loss, from gradual thinning to sudden patchy shedding

• Men and women experience different patterns and triggers, though many causes overlap

• Genetics, hormones, nutrition, stress, and scalp health all play a role

• UAE-specific factors like heat, hard water, and high-stress lifestyles can accelerate hair loss

• Identifying the root cause is the first step toward managing it effectively

Understanding What Alopecia Actually Means

Many people hear the word "alopecia" and think it only means complete baldness or the patchy type seen in children. In reality, dermatologists use it as a broad clinical term covering everything from mild seasonal shedding to severe, permanent loss.

Hair grows in cycles - anagen (growth), catagen (transition), and telogen (shedding). When something disrupts this cycle, more hairs enter the shedding phase than the growth phase, and visible thinning begins. The disruption can happen at the follicle level, inside the body, or both at the same time.

Understanding which type of alopecia is occurring helps explain why it is happening and what approach may help address it.

The Main Types of Alopecia

Why Alopecia Happens: The Root Causes

Hair loss rarely has a single cause. Several biological, lifestyle, and environmental factors interact with each other. Understanding these layers is what separates temporary shedding from long-term thinning.

Genetic Programming

Androgenetic alopecia - the most common form globally - is driven by genetics. Men inherit a sensitivity to dihydrotestosterone (DHT), a hormone derived from testosterone. DHT binds to receptors in the scalp and gradually shrinks hair follicles over time, causing thinner, shorter hairs until the follicle stops producing hair entirely.

Women can also inherit this sensitivity, but their pattern looks different. Instead of a receding hairline, women typically notice a widening part or general thinning across the crown, while the front hairline is often preserved. Estrogen partially offsets DHT's effect during the reproductive years, which is why women tend to notice androgenetic alopecia more after menopause.

Hormonal Shifts

Hormones govern the hair cycle more than most people realise. Several hormonal events directly trigger hair loss:

Pregnancy causes a surge in estrogen that keeps more hairs in the growth phase. After delivery, estrogen drops sharply and all those retained hairs enter the shedding phase at once - leading to postpartum hair loss that can feel alarming but is usually temporary.

Thyroid disorders, both overactive (hyperthyroidism) and underactive (hypothyroidism), interfere with the signaling that keeps hair follicles active. Many UAE residents, particularly women with undiagnosed thyroid conditions, experience unexplained diffuse shedding before any other thyroid symptom appears.

Polycystic Ovary Syndrome (PCOS) raises androgen levels in women, mimicking the DHT-related follicle miniaturisation seen in men. PCOS-related hair loss often appears alongside acne, irregular periods, or weight changes.

Autoimmune Triggers

In alopecia areata, the immune system mistakenly attacks hair follicles, treating them as foreign tissue. The result is sudden, smooth, coin-shaped bald patches anywhere on the scalp - or sometimes on the beard, eyebrows, or body. The follicle itself is not destroyed, which is why regrowth is possible, though timing is unpredictable.

More severe forms include alopecia totalis (complete scalp hair loss) and alopecia universalis (complete body hair loss). Stress, illness, or a significant immune event often precedes a flare.

Nutritional Deficiencies

Hair follicles are among the most metabolically active cells in the body. They need a constant supply of protein, iron, ferritin, zinc, biotin, and vitamins B12 and D to stay in the growth phase.

Iron deficiency is particularly common among women in the UAE - especially those following low-meat diets, experiencing heavy menstrual cycles, or during and after pregnancy. Low ferritin (stored iron) can trigger diffuse shedding even when hemoglobin appears normal on a basic blood test.

Vitamin D deficiency, extremely prevalent across the Gulf due to sun avoidance and indoor lifestyles, has been linked to alopecia areata and general hair thinning. The paradox of living in one of the sunniest regions in the world and still being deficient is explained by limited outdoor exposure, full-body covering, and the intense UV that drives people indoors.

Protein intake deserves particular attention. Hair is almost entirely made of keratin, a protein. Diets heavy in refined carbohydrates, processed foods, or chronically low in adequate protein reduce the raw material the body needs for hair construction.

Chronic Stress and Cortisol

Elevated cortisol - the stress hormone - disrupts the hair cycle by pushing follicles prematurely into the shedding phase. This is called telogen effluvium. The shedding typically appears two to four months after the stressful event, which makes the connection difficult to identify without careful history-taking.

In the UAE, high-pressure work environments, long commuting hours, shift work common in healthcare and hospitality, and the social pressures of an expatriate lifestyle create chronic low-grade stress that sustains elevated cortisol. This is not a single dramatic event - it is a prolonged physiological state that keeps disrupting the hair cycle month after month.

Scalp Health and Inflammation

A compromised scalp environment directly impacts follicle function. Seborrheic dermatitis - a fungal-driven inflammatory condition producing flaking, redness, and itching - is significantly more common in humid climates and worsens with sweating. When left unaddressed, the chronic inflammation around follicles can accelerate hair thinning.

Hard desalinated water, standard across most UAE taps, leaves mineral deposits on the scalp and hair shaft. These deposits can disrupt the scalp's natural pH, clog follicles, and make the scalp more prone to dryness and irritation. Switching between extreme AC-cooled indoor environments and intense outdoor heat compounds this by creating rapid moisture fluctuation that stresses the scalp barrier.

Medications and Medical Treatments

Several medications list hair loss as a documented side effect. These include:

• Blood thinners (anticoagulants)

• Certain blood pressure medications (beta blockers)

• High-dose vitamin A or retinoids

• Some antidepressants

• Hormonal contraceptives in women sensitive to progestin-dominant pills

• Chemotherapy agents (causing anagen effluvium)

Anyone who notices shedding beginning two to three months after starting a new medication should discuss it with their prescribing doctor - stopping medication without medical guidance is not advisable.

Physical Trauma to the Scalp

Repeated mechanical tension from tight braids, ponytails, hair extensions, or weaves pulls at the hairline and temples over time, leading to traction alopecia. This is particularly common among women who maintain tight styling for cultural, professional, or aesthetic reasons. Early traction alopecia is reversible. Once the follicle is repeatedly damaged and scarred, the loss becomes permanent.

Excessive heat styling - straighteners, blow dryers on high heat, and curling irons used frequently - does not damage follicles directly, but causes severe shaft breakage that mimics thinning at the scalp level.

Why Alopecia Can Look Different in Men and Women

Men tend to notice alopecia later because gradual thinning is normalised culturally. By the time many men seek help, follicle miniaturisation is already significantly advanced. Women, on the other hand, often seek help earlier but face a wider range of possible causes that require more thorough investigation before the right approach is identified.

How the UAE Environment Specifically Worsens Alopecia

Living in the UAE means contending with a unique combination of environmental stressors that most global research does not fully account for.

The heat between May and September is extreme. Scalp sweating increases sebum oxidation, creates a breeding environment for Malassezia fungus (a driver of dandruff and seborrheic dermatitis), and elevates inflammation levels at the follicle level.

Hard water from desalination plants contains elevated levels of calcium and magnesium. These ions bind to the hair shaft and scalp, disrupting moisture retention and the protective acid mantle. Regular exposure without a proper cleansing routine leads to buildup that progressively weakens follicle function.

The lifestyle in UAE cities - long working hours, late nights, frequent travel across time zones, disrupted sleep patterns - keeps cortisol levels elevated in ways that are difficult to reverse without deliberate lifestyle adjustment. Sleep is when growth hormone peaks and cellular repair occurs. Consistent sleep deprivation quietly removes one of the most powerful biological supports for healthy hair cycles.

Gulf dietary habits, including lower consumption of iron-rich foods among vegetarian and South Asian populations, high sugar and refined carbohydrate intake, and reliance on processed convenience foods, create micronutrient gaps that directly affect follicle nutrition.

Warning Signs That Deserve Medical Attention

Not all hair shedding needs a specialist. But certain patterns signal that an underlying condition needs investigation:

• Patchy or asymmetric loss appearing within days or weeks

• Hair loss accompanied by scalp redness, pain, burning, or scaling

• Shedding in clumps rather than individual strands

• Loss at the hairline with skin that appears shiny or scarred

• Total eyebrow or eyelash thinning alongside scalp loss

• Unexplained fatigue, weight change, or irregular periods alongside hair loss

These signs warrant a consultation with a dermatologist. A proper assessment often includes a scalp examination, trichoscopy (scalp magnification imaging), and targeted blood work covering thyroid function, ferritin, vitamin D, and hormonal panels.

Habits That Quietly Accelerate Alopecia

Several everyday behaviours make existing alopecia worse without people realising:

Washing hair too infrequently in the UAE heat allows sweat, sebum, and mineral deposits to accumulate and suffocate follicles. Washing too aggressively with harsh sulfate shampoos strips the scalp's protective barrier and triggers reactive sebum overproduction.

Crash dieting or extreme caloric restriction deprives follicles of both calories and micronutrients simultaneously. The body deprioritises non-essential functions like hair growth when calories are severely restricted, making telogen effluvium a predictable consequence.

Using very hot water in the shower - common during cooler months - strips scalp lipids and worsens dryness. Rinsing with cooler water at the end of a wash is a simple way to reduce this damage.

Ignoring dandruff or scalp irritation allows chronic low-grade inflammation to persist, which gradually degrades the quality of the environment in which follicles need to function.

A Root-Cause Approach: Traya's Perspective

Most people try one thing at a time - a new shampoo, then a supplement, then an oil - without understanding which specific factors are driving their loss. Traya's approach is built on the idea that alopecia is rarely mono-causal and therefore rarely responds to single-solution treatments.

Traya combines three knowledge systems: Ayurveda, which examines internal imbalances related to digestion, stress, sleep, and constitutional factors (dosha states); dermatology, which provides evidence-based clinical guidance on scalp health, follicle biology, and topical treatment; and nutrition science, which addresses the specific deficiencies and dietary patterns that starve follicles of what they need.

For UAE residents specifically, Traya's plans are developed with local realities in mind - hard water, heat-related scalp conditions, high-stress work patterns, Gulf dietary habits, and the hormonal profiles seen in women managing PCOS or postpartum recovery.

The starting point is a detailed Hair Test that analyses individual factors including age, hair loss stage, health history, lifestyle, sleep, stress, and diet. This helps build an understanding of which root causes are most active in that individual's case. Results and progress depend on individual factors and consistency - no outcome can be guaranteed, and the process works best when approached as a long-term commitment to scalp and body health rather than a quick fix.

Frequently Asked Questions

What is the most common cause of alopecia in men?

Androgenetic alopecia, commonly called male pattern baldness, is the most prevalent cause in men. It is driven by a genetic sensitivity to dihydrotestosterone (DHT), which gradually shrinks hair follicles over time. It can begin as early as the late teens or early twenties and tends to progress without early intervention.

Can stress alone cause alopecia?

Yes, elevated and prolonged stress can trigger telogen effluvium, where large numbers of hairs shift into the shedding phase simultaneously. The shedding typically appears two to four months after the stressful period, which makes the link easy to miss. In most cases, once the stress is managed and the body stabilises, normal growth can resume over several months.

Is alopecia in women always hormonal?

Not always, but hormones are a major driver. Women can experience hair loss due to thyroid disorders, PCOS, postpartum estrogen drops, or perimenopause. However, nutritional deficiencies - particularly iron, ferritin, and vitamin D - are also very common triggers in women, especially in the UAE where these deficiencies are widespread.

Does hard water in the UAE cause hair loss?

Hard water does not directly destroy hair follicles, but it contributes to scalp buildup, pH disruption, and mineral deposits on the hair shaft. Over time, this weakens the scalp environment and can worsen existing alopecia, particularly when combined with other stressors like heat and chemical exposure.

Can alopecia areata come back after it heals?

Yes. Alopecia areata is an autoimmune condition and is known for its unpredictable course. Hair can regrow fully, partially, or not at all, and recurrence is common - especially during periods of illness, high stress, or immune system disruption. Each episode should be assessed individually with a dermatologist.

At what point should I see a doctor for hair loss?

Consult a dermatologist if you notice sudden patchy loss, visible scalp changes like redness or scarring, shedding exceeding two to three months, hair loss accompanied by systemic symptoms like fatigue or irregular periods, or if over-the-counter approaches have not reduced shedding after three months. Early assessment significantly improves the options available.

Is alopecia permanent?

It depends entirely on the type. Telogen effluvium and alopecia areata are often reversible once the trigger is identified and managed. Androgenetic alopecia causes progressive follicle miniaturisation that becomes harder to reverse the longer it is left unaddressed. Scarring alopecias (such as lichen planopilaris) cause permanent follicle destruction and cannot be reversed - only stabilised.

Does diet really affect hair loss?

Hair follicles are among the most nutritionally demanding cells in the body. Chronic deficiencies in iron, ferritin, protein, zinc, biotin, and vitamins B12 and D are well-documented contributors to diffuse hair shedding. Improving nutritional status through diet and targeted supplementation - guided by blood test results - is one of the most evidence-supported components of managing alopecia.