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The document suggests that the traditional understanding of hair growth cycles and alopecia may be inaccurate and that blood supply plays a significant role in hair growth and loss.

Hair's internal fibers are arranged in a pattern that doesn't let much water in, and treatments like oils and heat change how much water hair can absorb.

Eosinophilia-myalgia syndrome, linked to contaminated L-tryptophan supplements, caused severe symptoms and some deaths, with long-term effects in survivors.

Hair cortisol levels can show increased stress during late pregnancy but only for up to six months.

Telogen effluvium is a reversible hair loss condition that requires a detailed diagnosis and often resolves on its own.

Hair loss causes stress and affects mental health; treatment and support needed.

Dermatoscopy and videodermatoscopy are useful for diagnosing and monitoring various skin, hair, and nail conditions.

Turing patterns are now recognized as important in developmental biology.

TrichoScan is a reliable method for measuring hair growth and is useful for assessing hair loss treatments.

Some women with acne have higher levels of free testosterone, which might suggest using hormonal treatments for acne.

Antiandrogen treatments combined with oral contraceptives can help manage hair growth and hair loss in women with PCOS.

Alopecia areata is an unpredictable autoimmune hair loss condition, treated based on severity, with half of patients regrowing hair within a year without treatment.

Premature graying of hair may suggest health issues and currently lacks effective treatments.

Lupus can affect the scalp and nails, often causing hair loss and nail damage, and needs early aggressive treatment to prevent permanent damage.

Melanocyte precursors in human fetal skin follow a specific migration pattern and some remain in the skin's deeper layers.

Azathioprine's effectiveness and safety require careful monitoring and more research, especially regarding its use with corticosteroids and the role of TPMT status in patients.

Trichoscan is a reliable method for measuring hair growth and monitoring treatment effectiveness in hair loss.

Black women's unique hair characteristics and styling practices can lead to specific scalp conditions, which require early diagnosis and appropriate treatment.

Some breast cancer patients developed permanent hair loss after chemotherapy and hormonal therapy, showing patterns similar to common baldness and alopecia areata.

Hair follicles on the scalp interact with and respond to the nervous system, influencing their own behavior and growth.

Lupus can cause hair loss and nail changes, with treatments available for both.

Monotreme hair structure and protein distribution are similar to other mammals, but their inner root sheath cornifies differently, suggesting a unique evolution from reptile skin.

Asian patients with Frontal Fibrosing Alopecia often lose eyebrow hair and respond well to combined antiandrogen or antimalarial and topical treatments.

Hair loss affects women's self-esteem; treatments like minoxidil can help.

The boy with woolly hair nevus had thinner hair and abnormal hair follicles, which improved with treatment but worsened when treatment stopped.

People with alopecia areata often have thyroid autoimmunity.

Lupus affects the skin in various ways, and proper skin examination is crucial for diagnosis and treatment.

Hair loss might be due to nerve issues, treatable with electric stimulation or acupuncture.

The document concludes that understanding hair biology and recognizing hair conditions are crucial for managing and treating hair loss in children.

The document concludes that skin and nail changes can indicate various underlying health conditions.