What Is Hypertrichosis?

Hypertrichosis refers to excessive hair growth on any part of the body in both men and women. It’s important to distinguish between hypertrichosis and hirsutism, the latter being excessive hair growth in androgen-dependent areas in women. Classification schemes for hypertrichosis vary based on age at onset, type of hair, and distribution.

Congenital generalized hypertrichosis includes conditions like universal congenital lanuginosa and Universalis congenital, while acquired generalized hypertrichosis and prepubertal hypertrichosis are other examples. Each type has distinct etiologies and clinical manifestations. Additionally, congenital localized hypertrichosis can result from conditions like congenital nevi, spinal dysraphism, Becker melanosis/nevus, and plexiform neurofibromas. Acquired and hereditary systemic diseases may also cause this condition.

Psychological and physical symptoms

The psychological distress induced by abnormal hair distributions warrants equal consideration along with physical symptoms. Support groups, counseling, and coping strategies empower those struggling with self-image. Comprehending vellus, lanugo, and terminal hair is essential to evaluating a patient suspected of having this disease. Lanugo hairs are thin, non-pigmented hairs that cover the typical fetus. It frequently measures several centimeters.

By the first several weeks of life, terminal hairs on the scalp and vellus hairs on the body should have completely replaced lanugo hair. Vellus hair, sometimes known as “peach fuzz,” is a short, fine, faintly colored hair that grows on the face, stomach, arms, and legs. Men also have terminal hair on their faces. During puberty, testosterone alters vellus hair with terminal hairs in androgen-dependent areas.

Androgens spur hair follicles toward masculinizing terminal states. Excess activity disrupts the balanced mosaic of vellus, terminal, and intermediate hairs.

Physical And History of Hypertrichosis

This condition has different forms, each with its medical history and clinical examination results. In cases of generalized hypertrichosis, the individual will have a terminal, lanugo, or vellus hair covering most of their body. It is possible to see the transition of terminal hair into lanugo hair.

Amid varying subtypes, hypertrichosis’s unifying trait is aberrant hair morphology, density, or distribution relative to age and sex norms. This condition is a symptom of several diseases. Congenital hypertrichosis lanuginosa manifests fairly strikingly; the entire body surface is coated in fine, silver-gray or blond lanugo hair, except for the soles, palms, dorsal feet and hands, and prepuce.

Up to 10 cm of hair can develop, creating the impression of a “werewolf.” Dental deformities, pyloric stenosis, glaucoma, and photophobia can all be symptoms of congenital lanuginosa. Marked lanugo overgrowth signals possible affiliated conditions requiring further medical investigation for patient wellbeing.

Types of Hypertrichosis

Hypertrichosis comes in various forms, each with distinct features and causes.

1. Acquired Hypertrichosis: This type develops later in life, often due to external factors such as medications, metabolic disorders, or cancer. Metastases and certain drugs can trigger the growth of fine lanugo hairs, indicating possible underlying issues.
2. Congenital Hypertrichosis: Present from birth, this form varies in its manifestations:
   • Hypertrichosis Cubiti (Hairy Elbow Syndrome): Appears on the forearms and elbows. It can be associated with short stature.
   • Hairy Soles and Palms Syndrome: Noted at birth, affecting the soles of the feet and palms of the hands.
   • Auricular Type: More common in males, this type typically emerges during childhood or adolescence and affects the ears.
   • Anterior Cervical: Found from birth to early childhood, often linked with neurological issues and hallux valgus.
   • Posterior Cervical: Appears at birth and is associated with kyphoscoliosis.

Each type of hypertrichosis may indicate different underlying conditions or genetic factors and requires specific medical evaluation. Terminal hair growth in temples, forehead, flexors, and neck can be linked to a history of systemic illness, traumatic brain injury, or medications commonly associated with this type of hair growth.

Other types of hypertrichosis

• Universal hypertrichosis presents with dense, long hair on the back, preauricular regions, and proximal extremities. It’s often described as having “typically exaggerated hairiness.”
• Ambras syndrome is characterized by fine, silky, long hair, primarily on the face, shoulders, ears, and nose. It is associated with minor dental malformations, abnormal nipples, and facial dysmorphism. In extreme cases, long, fine hair covers the face and trunk, highlighting associated anomalies.
• Prepubertal hypertrichosis often presents with diffuse, extensive involvement, becoming noticeable and troublesome during infancy. The condition features an “inverted fir tree” pattern, a low anterior hairline, and bushy eyebrows. Hair growth prominently affects the back, proximal extremities, and face, especially the temples, forehead, and preauricular regions.

How does hypertrichosis occur?

In acquired hypertrichosis lanuginosa, the body’s fine lanugo hairs grow quickly. Some mild variants affect only the face. Patients might have a history of cancer. Metastases and medications can trigger the growth of fine lanugo hairs, indicating underlying issues.

Congenital localization varies in its presentation. For example, hypertrichosis cubiti, or hairy elbow syndrome, appears on the forearms and antecubital fossa. This condition is sometimes associated with short stature. The syndrome of hairy soles and palms appears at birth. Auricular-type is more common in men and usually starts in childhood or adolescence.

The condition can affect the brows and nasal points during adolescence. Anterior cervical hypertrichosis manifests from birth to early childhood. It is linked to motor and sensory neuropathy, mental impairment, and hallux valgus. Kyphoscoliosis and posterior cervical hypertrichosis appear at birth and are connected. Localization to specific sites may point to underlying developmental, hereditary, or acquired anomalies. These require further medical investigation.

Why Does Hypertrichosis Occur?

This disease occurs due to genetic factors, certain medical conditions, and medications. It is characterized by excessive hair growth in areas of the body where hair does not normally grow. The exact causes can vary depending on the type of hypertrichosis, but it is generally linked to an abnormality in the hair growth cycle.

What Causes Hypertrichosis?

The cause of the disease is not known. Congenital hypertrichosis is assumed to be a genetic disorder that can arise either naturally or through inheritance. Occasionally, people with acquired hypertrichosis lanuginosa develop cancer of some form after being diagnosed with cancer. While intrinsic causes remain enigmatic, extrinsic triggers like neoplasms and medications offer clues into the pathological signaling behind this rare, visible condition.

Only 50 examples of this extremely unusual condition have been documented globally since the medieval era. Increased hair development in newborns is a defining feature of the syndrome. The lanugo hair is soft, delicate, unpigmented, and silky. It surrounds the fetus and is typically shed at roughly 8 months of pregnancy.

It is replaced with a delicate terminal scalp and vellus hair in preparation for birth and covers most of the body. The long, fine hair known as lanugo remains throughout life in congenital hypertrichosis. Retention of lanugo hair beyond infancy signifies disrupted developmental programming of the hair follicle system.

How to prevent hypertrichosis?

Preventing this condition marked by excessive hair growth involves a combination of lifestyle choices and medical management. Although you cannot prevent congenital forms, you can manage acquired hypertrichosis through several strategies. Firstly, it’s crucial to address underlying health conditions that may contribute to hypertrichosis.

• Regular health check-ups and early detection of diseases such as cancer or metabolic disorders can help prevent the onset of this condition. If medications might be causing hair growth, consult a healthcare provider to discuss alternative options.
• Maintaining a balanced diet and a healthy lifestyle can also play a preventive role. Certain nutritional deficiencies or imbalances may contribute to abnormal hair growth. Ensuring you get adequate vitamins and minerals can help maintain overall health and potentially reduce the risk of developing hypertrichosis.
• Practicing good skincare hygiene can help. Using products that prevent skin irritation and inflammation can minimize the risk of conditions that may lead to hypertrichosis. Regularly exfoliating and moisturizing the skin can keep it healthy and reduce the risk of complications.
• Genetic counseling may be beneficial for those with a family history of this skin disease or other related conditions. Understanding genetic risks can help in taking proactive steps to monitor and manage health conditions that might lead to hypertrichosis.

Treatment Options for Hypertrichosis

Each treatment option has its benefits and limitations, and the choice of treatment often depends on the type and severity of the disease, individual preferences, and medical advice.

Medical Treatments 

• Medications: Doctors may prescribe hormonal therapies or oral medications, such as anti-androgens or finasteride, to manage excessive hair growth. These drugs work by regulating hormone levels and addressing the hormonal imbalances that might contribute to hypertrichosis.
• Topical Solutions: Apply creams and ointments, such as eflornithine hydrochloride, directly to the skin. This application effectively slows hair growth. Doctors use these treatments for localized hypertrichosis.

Surgical Interventions

• Laser Hair Removal: This popular method uses concentrated light to target hair follicles, reducing hair growth over time. It is effective for long-term hair reduction and is suitable for larger areas.
• Electrolysis: This technique involves using electrical currents to destroy hair follicles permanently. It is ideal for smaller areas and individual hair removal.

Alternative Therapies

• Natural Remedies: Some people explore natural options like herbal treatments or essential oils, which may have mild effects on hair growth. However, their efficacy is not always scientifically validated. Consequently, results can vary widely. Therefore, it is essential to approach these remedies with caution and consult a healthcare provider.
• Lifestyle Changes: Adjusting diet and managing stress can sometimes help in cases of hypertrichosis related to hormonal imbalances or overall health. Ensuring a balanced diet rich in vitamins and minerals supports general well-being, which can indirectly affect hair growth.

Conclusion

Individuals afflicted with hypertrichosis may undergo significant emotional turmoil, especially if they are unable to access electrolysis or permanent laser hair removal treatments. As a result of societal judgment and bullying across a broad age range, these individuals often struggle with low self-esteem and diminished quality of life. By providing empathetic medical and mental health assistance, we can help those dealing with hypertrichosis cultivate self-acceptance while investigating secure, enduring methods of hair removal.

Additionally, by addressing underlying health issues, maintaining a healthy lifestyle, and practicing good skincare, people can reduce their risk of developing acquired hypertrichosis and effectively manage their overall well-being.