TYPES OF ALOPECIA

Causes, Patterns & Solutions

Experiencing hair loss? Not all hair loss is the same. Identifying the type of alopecia affecting you allows our specialists to design a precise, personalized treatment plan.

ANDROGENIC ALOPECIA

  • Genetic hair loss affecting men and women, usually seen as thinning or recession on the scalp.

Contact us for more information if needed.

BEARD AND EYEBROW ALOPECIA

  • Hair loss in the beard or eyebrows due to genetics, trauma, or over-plucking.

SCAR REPAIR AND TRACTION ALOPECIA

  • Hair loss caused by scars, surgery, injuries, or prolonged hair tension.

AREATA ALOPECIA

  • Autoimmune-related hair loss appearing in small patches on the scalp or face.

ALOPECIA BY INFECTION

  • Hair loss caused by bacterial or fungal infections affecting the follicle.

MEDICAL TREATMENT - RELATED ALOPECIA

  • Hair loss related to chemotherapy or other medical treatments.

ANDROGENETIC ALOPECIA

  • Genetic hair loss affecting men and women, usually seen as thinning or recession on the scalp.

Contact us for more information if needed.

BEARD AND EYEBROW ALOPECIA

  • Hair loss in the beard or eyebrows due to genetics, trauma, or over-plucking.

SCAR REPAIR AND TRACTION ALOPECIA

  • Hair loss caused by scars, surgery, injuries, or prolonged hair tension.

AREATA ALOPECIA

  • Autoimmune-related hair loss appearing in small patches on the scalp or face.

ALOPECIA BY INFECTION

  • Hair loss caused by bacterial or fungal infections affecting the follicle.

MEDICAL TREATMENT - RELATED ALOPECIA

  • Hair loss related to chemotherapy or other medical treatments.

*Proper diagnosis is essential. Our specialists evaluate each case to determine the most effective treatment plan.

Androgenetic Alopecia
(Genetic Hair Loss)

Androgenetic alopecia is the most common type of hair loss and primarily affects the scalp. It is a genetic condition caused by a progressive sensitivity of hair follicles to hormones, leading to gradual thinning and eventual hair loss in a characteristic pattern.

This condition affects both men and women and requires an accurate medical diagnosis to determine the most effective treatment approach.

How Androgenetic Alopecia Presents

Hair loss caused by androgenetic alopecia follows a predictable pattern:

- In men, hair loss typically begins at the frontal hairline and temples, followed by thinning at the crown. Over time, these areas may connect, creating the classic horseshoe pattern.

- In women, hair loss usually appears as diffuse thinning at the top of the scalp, while the frontal hairline is often preserved.

Hair loss caused by androgenetic alopecia follows a predictable pattern:

- In men, hair loss typically begins at the frontal hairline and temples, followed by thinning at the crown. Over time, these areas may connect, creating the classic horseshoe pattern.

- In women, hair loss usually appears as diffuse thinning at the top of the scalp, while the frontal hairline is often preserved.

As the condition progresses, hair becomes:

  • Thinner
  • Shorter
  • Less pigmented

Until follicles eventually stop producing visible hair.

The androgenic alopecia treatment is used for the most common type of alopecia, which affects 40% of the men in the world, but it is estimated that also 20% of the women in the world are affected by it.

What Causes Androgenetic Alopecia?

The primary cause of androgenic alopecia is genetic sensitivity of hair follicles to dihydrotestosterone (DHT), a hormone derived from testosterone.

DHT gradually weakens susceptible follicles, shortening the hair growth cycle. Each regrowth phase produces thinner hair until the follicle can no longer sustain growth. Importantly, research shows that hair loss is not caused by elevated DHT levels alone, but by genetically predisposed follicles that are more sensitive to it.

Who Is Affected by Androgenetic Alopecia?

  • Young and adult men
  • Young and adult women
In men with genetic predisposition, hair loss often begins around the age of 25, though earlier onset is possible. Women may experience noticeable thinning later in life or in association with hormonal changes.
Because it is hereditary, androgenetic alopecia may also affect future generations within the same family.

Diagnosis of Androgenetic Alopecia

The most accurate way to diagnose androgenetic alopecia is through a clinical evaluation by a hair restoration specialist.

In some cases, additional studies—such as hormonal testing—may be recommended to rule out contributing factors and guide treatment planning.

Treatment Options for Androgenetic Alopecia

There are medical treatments that may help slow progression, but currently no medication can completely stop or reverse androgenetic alopecia.

The most effective and permanent treatment is hair transplant surgery, particularly using advanced techniques such as FUE (Follicular Unit Extraction). (FUE vs. FUT: Which Hair Transplant Technique is Right for You?)

At Hair Medical Restoration, androgenetic alopecia is treated using advanced hair transplant techniques tailored to each patient’s pattern and degree of hair loss.

BEARD AND EYEBROW
ALOPECIA

Beard and eyebrow alopecia refers to partial or complete hair loss in facial areas such as the beard, mustache, sideburns, or eyebrows. This condition can significantly affect facial harmony and self-confidence, especially when hair growth is uneven or absent in visible areas.

CAUSES OF BEARD AND EYEBROW ALOPECIA

One of the main problems of beard alopecia is the aesthetic one. The hair does not cover the entire area. In these cases, men start to lose their sideburns, the beard is not thick or the mustache does not entirely grow.

There are different causes for this type of alopecia. One of the main reasons is genetics, each face has a genetic pattern that dictates the amount of hair one has. Among other causes is alopecia areata, which is caused by a bacteria or fungus infection or chemotherapy.

The causes vary from patient to patient and may affect one or multiple facial areas. The most common include:

  • Genetic predisposition, which determines hair distribution, thickness, and density
  • Alopecia areata, an autoimmune condition that causes circular hair loss patches
  • Stress and immune-related conditions, which may trigger temporary or recurrent hair loss
  • Bacterial or fungal infections affecting the hair follicle
  • Chemotherapy or systemic medical treatments
  • Trauma, burns, or scarring in facial areas
  • Improper hair removal, especially in the eyebrow region

Facial alopecia is generally classified as non-scarring alopecia, meaning hair may regrow depending on follicle health and the underlying cause.

Facial hair loss may present as:

  • Patchy or incomplete beard growth
  • Sparse or thin mustache
  • Loss of sideburns
  • Thinning or absence of eyebrow hair
  • Asymmetrical facial hair patterns

In many cases, facial hair never fully develops, while in others it becomes progressively thinner over time.

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In most cases, incomplete beard growth is related to genetic patterns that determine hair thickness, density, and distribution. While shaving is often believed to stimulate growth, there is no scientific evidence that shaving increases follicle density or hair thickness.

If facial follicles are weak or underdeveloped, hair may remain sparse unless medically evaluated and treated.

If you have areas on your face or eyebrows where hair does not grow or has progressively thinned, a professional evaluation is recommended. Identifying the underlying cause is essential to determine whether medical treatment or hair transplant surgery is the most appropriate solution.

Beard and eyebrow alopecia treatment varies from person to person, but most of the time we use the same treatments used for hair loss.

Eyebrow ALOPECIA

Eyebrow alopecia is characterized by hair loss above the eyes and is often more difficult to conceal due to the eyebrows’ role in facial expression and symmetry.

Beyond aesthetics, eyebrows provide functional protection, helping shield the eyes from sunlight, sweat, and debris. Their absence may cause discomfort in daily activities.

Eyebrow hair loss can result from aging, trauma, autoimmune conditions, excessive depilation, medications, or psychological factors. Accurate diagnosis is essential before starting any medical or surgical treatment.
  • Traumatisms caused by punches or blows.
  • Chemotherapy.
  • Traumatisms caused by burns.
  • Alopecia areata.
  • Badly-done depilation.
  • Psychological disorders.
  • Medicines.

Unlike beard or scalp hair loss, eyebrow alopecia is particularly difficult to conceal. Eyebrows are a defining facial feature and play a central role in non-verbal communication.

Well-designed eyebrows help:

  • Frame the face
  • Enhance the eyes and nasal structure
  • Maintain facial symmetry
  • Protect the eyes from sweat, sunlight, and debris

Facial alopecia may resolve spontaneously in some cases; however, recurrence is possible. A medical evaluation is required to determine whether treatment should be:

  • Medical, aimed at stimulating existing follicles, or
  • Surgical, using eyebrow hair transplant techniques when hair loss is permanent

At Hair Medical Restoration, facial alopecia cases are evaluated individually to determine the most appropriate approach.

When medical treatment is insufficient or ineffective, hair transplant using advanced techniques can restore eyebrow density with natural direction and design.

SCAR REPAIR & TRACTION ALOPECIA

Scar repair alopecia and traction alopecia are forms of hair loss caused by physical damage to the hair follicles. Unlike genetic alopecia, these conditions result from external factors that injure or destroy the follicle, preventing normal hair growth.

While they share a traumatic origin, each type has distinct causes and treatment considerations.

What Is Traction Alopecia

Traction alopecia occurs when continuous tension is applied to the hair over long periods of time. This constant pulling weakens the follicles and may eventually cause permanent hair loss if not addressed early. It is more commonly seen in women and is often associated with certain hairstyling habits.

Common causes include:
  • Tight ponytails, braids, buns, or extensions
  • Repeated use of hair styling tools that apply heat or tension
  • Frequent chemical treatments or aggressive hair dyeing

Traction alopecia usually develops gradually and may present with the following signs:

  • Progressive thinning along the hairline or specific areas
  • Increased hair shedding when brushing or styling
  • Scalp discomfort, itching, or localized pain
  • Flaking or irritation in affected areas

Early detection is essential, as follicles may recover if tension is removed in time.

Traction alopecia can often be prevented by adopting hair care practices that minimize tension and stress on the scalp. When detected early, medical treatments may help stimulate natural regrowth.

In cases where follicles have been permanently damaged, hair transplant surgery can be considered as a long-term solution, restoring hair to affected areas using healthy follicles from donor regions.

When follicles are permanently damaged, hair transplant surgery is the most reliable solution to restore hair in scarred or traction-affected areas.

SCAR REPAIR ALOPECIA

Scar alopecia occurs when hair follicles are destroyed due to trauma or scarring. Once scar tissue forms, hair cannot grow naturally in the affected area.

Common causes include:
  • Surgical scars
  • Burns or accidents
  • Infections
  • Inflammatory skin conditions
Because scar tissue lacks functional follicles, hair restoration in these cases requires specialized evaluation and surgical planning.

Hair loss in scarring alopecia is driven by an inflammatory process in which immune cells damage the follicles. Clinically, it is classified into three main types:

  • Lymphocytic scarring alopecia
  • Neutrophilic scarring alopecia
  • Mixed scarring alopecia

Identifying the inflammatory pattern is essential for determining whether medical treatment can stabilize the condition before considering surgical options.

AREATA ALOPECIA

Hair loss in small, well-defined areas of the scalp or beard.

Know all AboutAREATA ALOPECIA

Alopecia areata is characterized by sudden hair loss in small, round patches on the scalp, beard, or other areas. These patches appear when the immune system mistakenly attacks the hair follicles, temporarily interrupting hair growth.

This condition does not destroy the follicles permanently, which means regrowth is possible in many cases.
The androgenic alopecia treatment is used for the most common type of alopecia, which affects 40% of the men in the world, but it is estimated that also 20% of the women in the world are affected by it.

Alopecia areata has an autoimmune origin. The body’s own defenses cause inflammation around the hair follicle, leading to hair shedding. The exact trigger is unknown, but genetic predisposition plays an important role, and stress is often identified as a contributing factor.

Its evolution is unpredictable. Hair may regrow spontaneously within months, remain stable for years, or present cycles of loss and regrowth. Medical treatment can help control inflammation and stimulate regrowth, although recurrence is possible once treatment is stopped.

Treatment is primarily medical, and surgical options may be considered only in selected, stable cases.

ALOPECIA BY INFECTION

Hair loss caused by bacterial or fungal infections affecting the hair follicle.

What causes Alopecia by infection?

It is caused by bacteria or fungi that injure the hair follicle.

Before any surgery or treatment, a diagnosis is required and many times a biopsy or culture is necessary. Initially it will be attended with medical treatment and later with hair transplantation.

This type of alopecia occurs when bacteria or fungi infect the scalp or skin, damaging the hair follicle and disrupting normal growth. If left untreated, the inflammation can lead to permanent follicle damage.

A proper medical diagnosis is essential. In many cases, a culture or biopsy is required to identify the infection accurately.

Treatment usually begins with targeted medical therapy. Once the infection is fully controlled and the area is stable, hair transplantation may be considered if permanent hair loss remains.

MEDICAL TREATMENT - RELATED ALOPECIA

Temporary or permanent hair loss related to cancer treatments.

Treatment in HMR Tijuana

Both cancer treatments cause hair loss, but with the FUE technique for hair transplantation, alopecia will no longer be a problem.

Do not compromise your health with other hair transplant surgeries that require more recovery.

Chemotherapy and radiotherapy can cause hair loss by affecting rapidly dividing cells, including hair follicles. In many patients, hair regrows naturally once treatment ends. However, in some cases, follicular damage may be long-lasting.

After medical clearance and once the condition is stable, hair transplant surgery using the FUE technique may be an option to restore hair in affected areas, offering a minimally invasive approach with natural results.

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