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Hair damage shows as fragility, dullness, and discoloration, varies by ethnicity, and is worsened by cosmetic procedures and diseases.

A new method accurately classifies hair types, showing global hair diversity.

Trichoscopy is a quick and easy way to diagnose most genetic hair problems without invasive methods.

Future hair cosmetics will be safer and more effective.

The document concludes that unruly hair can be congenital or acquired, often lacks specific treatments, and can be managed with oils and short hairstyles.

Women using hair relaxers with alopecia had lower zinc levels, suggesting zinc deficiency might contribute to hair loss.

Understanding and treating hair disorders in different ethnic groups requires knowledge of specific hair care practices and hair characteristics.

Chemical hair straightening improves smoothness and shine but may cause side effects, suggesting a need for safer methods.

Hair keratins evolved from ancient proteins, diversifying through gene changes, crucial for forming claws and later hair in mammals.

A 38-year-old African American woman has a rare condition that prevents her from growing long hair.

Hair dyes vary in how long they last and how deeply they penetrate hair.

Dermatologists need to understand hair products to treat hair and scalp issues better.

Dermoscopy helps quickly identify hair breakage in people of African descent.

Hair loss treated with minoxidil, finasteride, laser/light, hair transplant, and scalp prostheses; more research needed for skin of color.

Normal hair thickness varies by scalp area and a mix of hair thicknesses is typical in healthy individuals.

Oral retinoids can cause side effects ranging from mild to severe, including birth defects, and require careful monitoring and contraception.

Papulopustular rosacea is an inflammatory skin condition treatable with lifestyle changes and medications.

Hair and nail changes can indicate health issues, including cancer and side effects from cancer treatments.

Hair loss can cause significant social and emotional issues, especially for women and young men.

The research found specific genes and pathways that control fur development and color in young American minks.

Women of color in Northern Manhattan view hair care as important to their identity and culture, and education on harmful chemicals in hair products is needed.

The research found that a specific gene mutation causes fewer hair follicles and disrupted hair growth cycles, leading to thin and short hair in people with Hypotrichosis with Juvenile Macular Dystrophy.

The study found that minor protein differences between curved and straight Japanese hair are unlikely to significantly affect hair structure.

Trichoscopy is a useful tool for diagnosing hair and scalp diseases without needing skin biopsies.

The document concludes that accurate diagnosis of hair disorders is crucial and requires a range of diagnostic methods.

Dermatologists need to understand African American hair-care practices to better treat their hair and scalp disorders.

Hair analysis can offer clues about a person, but individual differences limit making precise identifications.

Hair restoration surgery has improved to transplant hair in natural groupings, but it's labor-intensive and can't fully restore normal hair density.

Environmental and cosmetic factors, including heat, chemicals, and sun exposure, can cause hair loss and damage.

Some drugs can cause skin, nail, and hair problems, which are important for healthcare professionals to recognize and report.