Hypertrichosis is a condition characterized by excessive hair growth anywhere on the person’s body. There are two main types: congenital, usually due to genetic mutations and present at birth, and acquired, which develops later in life due to underlying diseases, medications, or certain cancers. Racial or ethnic backgrounds, age, and environmental factors may also play a role. Medications like cyclosporine, minoxidil, phenytoin, and some corticosteroids have been associated with the condition. Management depends on the cause, and can range from changing medication to treating the underlying disease, or cosmetic procedures for hair removal if the condition causes distress.


Hypertrichosis is a condition characterized by excessive hair growth anywhere on the body, not to be confused with hirsutism, which is excessive hair growth in areas where men typically grow hair and women do not (like the face, chest, and back). The hair in hypertrichosis can be either terminal (thick, coarse, and pigmented) or vellus (fine and nonpigmented), depending on the specific type of the disorder.

Hypertrichosis can be classified into two main categories:

  1. Congenital Hypertrichosis: This is a very rare form, usually present at birth. It can be generalized, affecting the entire body, or localized, affecting a particular area. Congenital hypertrichosis is often due to genetic mutations.
  2. Acquired Hypertrichosis: This form typically develops later in life. It can also be generalized or localized, and usually appears as a symptom of another condition or as a side effect of certain medications.

Clinical factors

  • Underlying diseases: Certain conditions like porphyrias, endocrine disorders, or malnutrition can lead to hypertrichosis. In particular, anorexia nervosa has been linked to the development of generalized hypertrichosis.
  • Medications: Drugs such as cyclosporine, minoxidil, phenytoin, and some forms of corticosteroids have been associated with acquired hypertrichosis.
  • Cancer: Hypertrichosis can occasionally be a paraneoplastic syndrome, an unusual systemic sign of an underlying cancer.

Non-clinical factors

  • Race and ethnicity: Certain ethnicities, like some populations from the Indian subcontinent and Middle East, may naturally have more body hair compared to other racial or ethnic groups.
  • Age: Hair growth patterns and thickness can change with age. For instance, older individuals may notice an increase in hair growth in certain areas.
  • Environmental factors: Prolonged exposure to certain environmental factors, like extreme temperatures, may stimulate body hair growth as a protective response.

Management of hypertrichosis often depends on the underlying cause. If it’s due to a medication, stopping or changing that medication (under a doctor’s supervision) may help. In cases where the hair growth is distressing to the patient, cosmetic procedures like laser hair removal or electrolysis might be suggested. If the hypertrichosis is a sign of an underlying disease, treating that disease can often help reduce the excessive hair growth.



Hypertrichosis presents with the key symptom of excessive hair growth, which can occur anywhere on the body. The hair may be vellus (fine, non-pigmented) or terminal (thicker, coarser, and pigmented) depending on the subtype of the condition.

The pattern of hair growth can provide clues to the type of hypertrichosis. For example, localized hypertrichosis shows excessive hair growth in one area, while generalized hypertrichosis affects the entire body.

There might not be any additional symptoms in some cases, but if hypertrichosis is part of an underlying condition or syndrome, other symptoms related to that condition could be present. For instance, if it’s a side effect of medication, symptoms related to that medication’s other effects might be noticed.


Diagnosing hypertrichosis involves a detailed medical history, a thorough physical examination, and possibly further diagnostic testing. The doctor will ask about the onset and progression of the hair growth, associated symptoms, family history, and any medications you are taking.

The physical examination would evaluate the pattern, density, and type of hair growth. The rest of the body might also be examined for signs of associated conditions, such as an endocrine disorder or cancer.

In some cases, further diagnostic testing might be needed. Blood tests could help identify hormonal imbalances, nutritional deficiencies, or markers of certain diseases. In rare cases, genetic testing might be performed, especially when congenital forms of hypertrichosis are suspected.

In a nutshell, diagnosis of hypertrichosis is typically based on the clinical presentation and may involve further tests to identify any underlying causes. The aim is not just to diagnose the condition but also to identify and manage the root cause whenever possible.

Prognosis and Impact


The prognosis and impact of hypertrichosis largely depend on its underlying cause.

If hypertrichosis is caused by an underlying medical condition such as an endocrine disorder, the prognosis may improve once that condition is treated. Similarly, if it is a side effect of medication, the hypertrichosis might resolve once the medication is discontinued or adjusted, although this should always be done under medical supervision.

Congenital forms of hypertrichosis, being genetic in nature, are typically lifelong conditions. While the excess hair itself does not generally pose a direct health risk, it can have significant psychological and social impacts. Affected individuals might experience self-esteem issues, social stigma, or even discrimination due to their unusual appearance.


The impact of hypertrichosis on a person’s quality of life can be substantial, especially if it’s visible and difficult to manage. Many people with the condition invest considerable time and resources into hair removal procedures, which might be costly and could lead to skin irritations or other complications.

Treatment of the symptom, such as through hair removal techniques, doesn’t cure the disorder but can help improve self-esteem and quality of life. Such treatments include shaving, waxing, laser therapy, and electrolysis. However, these treatments might be impractical for generalized forms of hypertrichosis due to the large surface area of the body that would need to be treated.

Treatment Options

  1. Addressing Underlying Causes: If hypertrichosis is associated with an underlying medical condition, treating that condition might reduce hair growth. Likewise, if a medication is causing the hypertrichosis, changing the medication, if possible, may help.
  2. Cosmetic Hair Removal: For people bothered by the appearance of excess hair, several methods of hair removal are available:
    • Shaving or Trimming: These are the simplest and least expensive methods, but the effects are short-lived, and the hair regrows quickly.
    • Waxing or Plucking: These methods remove hair from the roots and might offer longer-lasting results compared to shaving. However, they can be painful and time-consuming, and there’s a risk of skin irritation or ingrown hairs.
    • Depilatory Creams: These creams work by breaking down the hair structure. They’re relatively easy to use, but some people might have skin reactions to the chemicals.
    • Electrolysis: This procedure destroys the hair follicle using an electric current. It can offer permanent hair removal, but it’s often time-consuming, expensive, and can be painful.
    • Laser Therapy: This is a long-lasting but expensive method of hair reduction. Laser therapy targets the hair follicles to prevent or reduce hair growth, and usually requires multiple sessions.
  3. Pharmacologic Treatment: No specific drug is currently approved for the treatment of hypertrichosis, but some drugs have shown promise in limited case studies and clinical trials. These should only be used under the guidance of a healthcare professional.
  4. Psychosocial Support: Given the potential psychological impact of hypertrichosis, providing emotional support, education, and potential referral to mental health professionals might be an essential component of the treatment plan.

Risks and Side Effects

  1. Addressing Underlying Causes: Changing medications or treating the underlying condition can have various side effects depending on the specific situation. Any changes to medication should only be made under the supervision of a healthcare provider to manage potential risks.
  2. Cosmetic Hair Removal:
    • Shaving or Trimming: The most common side effects are minor skin irritation, razor burn, and the risk of cuts. Over time, shaving can also lead to skin darkening.
    • Waxing or Plucking: These can cause pain, redness, irritation, and the potential for ingrown hairs or skin infections. Repeated waxing or plucking can lead to scarring over time.
    • Depilatory Creams: They can cause skin reactions like rash, redness, itching, and burning. It’s important to do a patch test before using these products to check for any skin reaction.
    • Electrolysis: This can cause discomfort or pain, redness, swelling, and in some cases, scarring or changes in skin color. There’s also a risk of infection if the procedure isn’t done in a sterile environment.
    • Laser Therapy: Potential side effects include pain, redness, swelling, and changes in skin color. There’s also a small risk of burns or blisters, especially in darker skin tones or with inappropriate laser settings. Laser treatment should always be performed by a trained professional to mitigate these risks.
  3. Pharmacologic Treatment: Drugs used off-label to manage hypertrichosis might cause a wide range of side effects depending on the specific medication. It’s crucial to discuss these potential risks with a healthcare provider before starting any new medication.
  4. Psychosocial Support: Generally, this doesn’t pose any physical risks but can sometimes bring up difficult emotions during counseling or therapy. It’s important to work with a supportive and experienced mental health professional to navigate these emotions safely.

FAQ Section

Hypertrichosis is a condition characterized by excessive hair growth anywhere on the body, unrelated to normal hair growth patterns.

The causes of hypertrichosis vary, including underlying medical conditions, medication side effects, certain cancers, and in some cases, genetic mutations. Non-clinical factors such as race, age, and environmental factors may also play a role.

While both conditions involve excessive hair growth, hirsutism refers to male-pattern hair growth in women, such as facial hair, while hypertrichosis is excessive hair growth anywhere on the body, in both men and women.

Diagnosis typically involves a detailed medical history, physical examination, and potentially further diagnostic testing such as blood tests or genetic testing, particularly if other symptoms suggest an underlying condition.

The treatment of hypertrichosis focuses on managing symptoms and addressing underlying causes. If it’s due to a medication or a treatable disease, hair growth may lessen when the cause is addressed. However, genetic forms of the disorder can’t be ‘cured’ as such, but symptoms can be managed.

Treatment options include addressing underlying causes, cosmetic hair removal techniques like shaving, waxing, laser therapy, electrolysis, and in some cases, medication. Psychological support may also be beneficial.

Some treatments, like electrolysis and laser therapy, can provide long-lasting hair reduction, but multiple sessions are usually needed, and they may not be effective for everyone.

Yes, side effects can include skin irritation, redness, swelling, changes in skin color, and in rare cases, scarring or infection. It’s important to have these treatments performed by a trained professional to minimize risks.

As it’s often genetic or due to factors beyond an individual’s control, prevention isn’t generally possible. However, if it’s related to medication use, it may be preventable by using an alternative medication if appropriate.

Support can range from medical treatment to manage symptoms, to mental health support to help with the psychological and social challenges that can accompany the condition. Some online communities and advocacy groups also provide peer support and resources.