The Complete Guide to the Types of Hair Loss

Why identifying the type matters

Most people start looking into hair loss because they notice something: a wider part, more scalp showing under bathroom lights, a receding temple, or more hair than usual in the shower drain. The natural next step is to search for a product. But the right product depends almost entirely on what kind of hair loss you actually have.

Hair loss falls broadly into two groups. Non-scarring hair loss is by far the most common. The follicle is still alive and can, in principle, produce hair again. Scarring (cicatricial) hair loss is much rarer: inflammation destroys the follicle and replaces it with scar tissue, so hair in that area cannot regrow. Recognizing which group you are in, and which type within it, saves months of using the wrong approach.

This guide walks through the types you are most likely to encounter, how to tell them apart and when a professional opinion is essential. It is educational, not diagnostic. Only a clinician who examines your scalp can confirm what is going on.

Androgenetic alopecia (pattern hair loss)

Androgenetic alopecia, often called male or female pattern hair loss, is the most common cause of hair thinning worldwide. It is estimated to affect a majority of men by later life and a large share of women, especially after menopause. It is driven by a combination of genetics and the way hair follicles in certain areas of the scalp respond to androgens (hormones such as dihydrotestosterone, or DHT).

In genetically susceptible follicles, each growth cycle becomes a little shorter and the follicle itself gradually shrinks, a process called miniaturization. Over years, thick pigmented terminal hairs are replaced by finer, shorter, lighter hairs, until some follicles produce hair that is barely visible.

In men, the pattern usually begins at the temples and/or the crown and is described with the Norwood (Hamilton-Norwood) scale. In women, the frontal hairline is usually preserved and thinning appears as a widening central part and reduced density over the top of the scalp, described with the Ludwig or Sinclair scales.

Pattern hair loss is gradual and progressive. It does not cause bald patches overnight, and it does not normally cause itching or pain. It is the type for which topical Minoxidil is most widely studied and approved in the United States.

• Typical onset: from the late teens onward in men; often in the 40s-50s in women, although earlier onset occurs
• Pattern: temples and crown (men); central part and crown with preserved hairline (women)
• Hair quality: gradual thinning and shortening of individual hairs
• Common approaches: topical Minoxidil, clinician-prescribed options, supportive scalp care

Telogen effluvium (stress or trigger-related shedding)

Telogen effluvium is a temporary increase in shedding across the whole scalp. Normally around 10-15% of scalp hairs are in the resting (telogen) phase at any moment. After a significant physical or emotional stressor, a much larger proportion of hairs can be pushed into telogen at the same time. Roughly two to four months later, those hairs are shed together.

Common triggers include high fever or serious illness, surgery, childbirth, crash dieting or rapid weight loss, significant emotional stress, starting or stopping certain medications, and iron deficiency. Because of the delay, many people don't connect the shedding to its cause.

Telogen effluvium looks different from pattern hair loss. The shedding is diffuse rather than patterned, hairs often come out with a small white bulb at the root, and the overall ponytail may feel thinner while the hairline stays intact. In acute cases, shedding typically settles within about six months of the trigger resolving, and density gradually recovers. Chronic telogen effluvium, lasting longer than six months, is also recognized and deserves a medical work-up.

Alopecia areata (patchy, autoimmune hair loss)

Alopecia areata is an autoimmune condition in which the immune system targets hair follicles. It classically causes smooth, round or oval bald patches that can appear quickly, sometimes within days. It can affect the scalp, beard, eyebrows or body, and in rarer forms can lead to total scalp or body hair loss.

The skin in the patch usually looks normal: no scarring, no scale. Short broken hairs that narrow toward the base (so-called exclamation-mark hairs) are sometimes visible at the edges. Alopecia areata can resolve on its own, recur or progress, and it can affect people of any age.

Alopecia areata is a medical condition managed by dermatologists. Over-the-counter hair-growth products are not a substitute for that assessment. If you notice a sudden round patch, see a clinician rather than waiting to see whether a topical helps.

Traction alopecia

Traction alopecia is caused by repeated tension on the hair follicle. Tight ponytails, buns, braids, cornrows, extensions, weaves and some headwear pull on the same areas day after day. The hairline at the temples and around the edges is typically affected first.

Early traction alopecia is often reversible if the tension is removed. Over years of continued pulling, however, follicles can scar and the loss can become permanent. The single most useful step is changing the hairstyle: looser styles, rotating the position of the tension, shorter wear times for extensions and giving the hairline regular breaks.

Scarring (cicatricial) alopecias

Scarring alopecias are a group of uncommon inflammatory conditions, including lichen planopilaris, frontal fibrosing alopecia, central centrifugal cicatricial alopecia and discoid lupus. In each, inflammation damages the follicle stem cells and the follicle is replaced by scar tissue.

Warning signs include scalp itching, burning or tenderness; redness or scaling around hair follicles; shiny, smooth skin where follicular openings are no longer visible; and a slowly receding hairline that includes the eyebrows in some cases. Early diagnosis matters because treatment aims to stop progression. Hair that has already been lost to scarring does not regrow.

Other causes worth knowing

Several other situations can cause or contribute to hair loss. Some are easy to correct, which is one reason a proper assessment is worthwhile.

• Thyroid disorders: both under- and over-active thyroid can cause diffuse thinning
• Iron deficiency and other nutritional gaps: low ferritin is frequently checked in women with shedding
• Medications: some blood thinners, retinoids, certain antidepressants, hormonal changes and chemotherapy can affect hair
• Postpartum shedding: a form of telogen effluvium common a few months after childbirth
• Scalp conditions: significant seborrheic dermatitis, psoriasis or fungal infection (tinea capitis) can affect the hair
• Hair shaft damage: heat, bleaching and chemical straightening can cause breakage that looks like thinning
• Trichotillomania: a hair-pulling condition that benefits from supportive professional care

Side-by-side comparison

The table below summarises the most common types. It is a starting point for a conversation with a clinician, not a self-diagnosis tool.

How pattern hair loss and shedding can overlap

It is common to have more than one thing going on. A person with early pattern hair loss who then goes through a stressful period or illness may experience telogen effluvium on top. The shedding makes the underlying thinning suddenly much more noticeable, and it can be difficult to separate the two.

This overlap is one reason clinicians look at the history as well as the scalp: when did it start, is it patterned, has there been a trigger, is there a family history? It is also why expectations for any product need to be set carefully. Topical Minoxidil addresses the follicle's growth cycle; it cannot remove the trigger behind a telogen effluvium.

How a clinician works out the cause

The pattern is a clue, but it is not a diagnosis. A clinician may ask when the change began, whether it has been steady or sudden, what you notice in the shower or on the pillow, and whether anyone in your family has similar thinning. They will also ask about recent illness, childbirth, weight changes, medicines and hairstyles. These questions help distinguish a slowly changing hairline from an episode of widespread shedding.

A scalp examination looks for variation in hair diameter, the distribution of loss, broken hairs, scale, redness and whether follicular openings are still visible. A dermatologist may use a magnifying tool called a dermatoscope or trichoscope. Sometimes a gentle pull test helps assess active shedding. Blood tests are not necessary for everyone; they are chosen according to symptoms and history, for example when iron deficiency or thyroid disease is suspected. A biopsy may be considered when scarring or another inflammatory disorder is unclear.

Bring photos taken several months apart if you have them. If you cannot tell whether hairs are shedding from the root or snapping along the shaft, mention that too. Breakage can follow chemical or heat damage and needs a different response from follicle-level loss. The aim of an appointment is not to order every test; it is to make a plausible diagnosis and a plan that fits what is actually happening.

What each treatment can and cannot do

For pattern hair loss, topical Minoxidil is an over-the-counter medicine with evidence for regrowth and maintenance while it is used. Men may also discuss prescription finasteride with a clinician. Some clinicians consider other prescriptions, such as oral Minoxidil, dutasteride or spironolactone, off-label in selected people. Those choices require an individual review of risks, other medicines and pregnancy considerations. A hair transplant redistributes donor hair, but cannot stop ongoing loss of non-transplanted hair.

Telogen effluvium is handled differently. The first step is to identify and address the trigger where possible; the shedding may settle as the hair cycle recovers. Alopecia areata is a specialist diagnosis with its own treatment pathway. Scarring conditions need prompt medical care aimed at reducing inflammation and limiting further loss. With traction alopecia, easing tension early is central; adding a growth product without changing the hairstyle misses the cause.

Shampoos, conditioners and styling products can help hair look fuller and make a routine more comfortable, but a cosmetic product is not a substitute for treating the underlying cause. Supplements are useful when a deficiency is identified; taking more of a nutrient when levels are already adequate does not necessarily improve hair. Ask which outcome matters most to you: less shedding, maintaining current coverage, regrowing visible density or simply making daily care easier. Different options answer different goals.

A realistic timeline, not a countdown

Hair changes slowly because follicles do not all cycle together. With gradual pattern hair loss, a month is usually too short to judge a treatment. Many topical Minoxidil labels tell users to allow several months before assessing whether it is helping; some people notice early shedding before improvement. Keep the directions for your exact product as the authority, and ask a clinician about persistent worsening or bothersome effects.

After an episode of telogen effluvium, the shedding can begin months after the triggering event and may resolve gradually after that trigger has passed. Visible fullness often takes longer to return because new hairs must grow long enough to contribute to coverage. A transplant has its own recovery and regrowth schedule, commonly measured over a year or more. Scarring conditions are different again: the urgent goal is to stop progression, not to wait for spontaneous regrowth in scarred areas.

Monthly photographs are more useful than daily counting. Use the same lighting, angle, distance and hair part. If you start a treatment, note the date, how often you actually use it and any irritation. Bring that record to a follow-up appointment. It helps distinguish a product that has not had enough time from one that is not suitable or tolerable for you.

FOLIGAIN® and other options: an honest comparison

If a clinician or pharmacist confirms that an OTC Minoxidil product is appropriate, compare the Drug Facts panels first. At the same labeled concentration, FOLIGAIN® Minoxidil and other OTC Minoxidil brands use the same drug active. A different brand may offer a vehicle, applicator, pack size or price that fits your routine better. A foam may appeal to someone who dislikes the feel of a solution; a solution may be easier to apply through longer hair. Check each current label rather than assuming that every product with the same brand name has the same directions.

FOLIGAIN® also offers cosmetic hair-care products featuring TRIOXIDIL®, a FOLIGAIN® cosmetic complex. These products may support the look and feel of hair and scalp, but they should not be described as equivalent to an FDA-approved regrowth medicine. A competing cosmetic shampoo or conditioner may meet the same appearance or comfort goal. Neither cosmetic route replaces assessment for sudden shedding, patchy loss or inflammatory symptoms.

For prescription drugs and procedures, the meaningful comparison is with a clinician's diagnosis and risk assessment, not a brand ranking. Minoxidil and finasteride have different roles; hair transplantation answers a different question again. Some people combine approaches under professional guidance, while others prefer to begin with one sustainable step. You do not need to buy a FOLIGAIN® product to act on this guide. The right next move may be a medical visit, a change in styling habits or simply a reliable baseline photograph.

What to track before choosing a product

Before starting anything, spend a couple of weeks gathering information. It will make any conversation with a clinician far more productive and give you a reliable baseline.

• Photographs of the hairline, part and crown under consistent lighting
• When you first noticed the change and whether it was gradual or sudden
• Any illness, surgery, childbirth, diet change, new medication or major stress in the previous six months
• Family history of thinning on either side
• Scalp symptoms: itching, pain, burning, flaking, redness
• Hair-care habits: tight styles, heat, bleach, chemical treatments

Where FOLIGAIN® fits

FOLIGAIN® products are designed around the most common scenario: gradual, patterned thinning in adults. FOLIGAIN® Minoxidil products contain the same regulated active ingredient available across the US over-the-counter market. FOLIGAIN® cosmetic products, such as shampoos and conditioners featuring the TRIOXIDIL® complex, are designed to support the look and feel of thinning hair and a comfortable scalp. They are cosmetic products and are not intended to treat hair loss.

If your hair loss looks like one of the other types described here, especially patchy loss, scalp symptoms or signs of scarring, see a dermatologist first. Choosing the right approach for the right type is what gives any routine a fair chance.