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This review examines the existing research on pathologic hairpulling, skin picking, and nail biting, suggesting these behaviors are underrecognized and may benefit from a unified diagnostic categorization; it reports no new clinical findings.

This source reports that biotin, a water-soluble vitamin B7, may benefit skin, hair, and nail health, including various types of alopecia, without the risk of hypervitaminosis even at high doses.

This article presents an overview of uncombable hair syndrome, emphasizing its clinical and molecular characteristics and noting systemic manifestations such as neuropsychiatric, ophthalmic, and cardiopulmonary issues.

This review discusses the use of biotin for hair and nail growth, noting clinical improvement in cases with existing pathologies, but concludes there is insufficient evidence supporting its benefits for healthy individuals.

This review discusses the expanding applications of dermoscopy in dermatological diagnosis beyond its initial use for detecting dysplastic nevi and reports no new clinical results.

This review provides an overview of the physiologic skin changes during pregnancy but reports no new findings, emphasizing the need for physicians to distinguish between benign and potentially pathological conditions.

The document explains what healthy skin, nails, and hair look like on an ultrasound.

This review discusses how emerging technologies in dermatology are enhancing the ability to diagnose and treat hair and nail disorders more accurately and effectively, highlighting advancements in both diagnostic techniques and therapeutic methods such as AI-driven technologies that personalize patient care and improve outcomes.

In this study of elderly patients at an Indian medical center, researchers found that xerosis was the most common physiological skin change and pruritus was the most frequent complaint.

More research is needed to understand how hair keratins work and their role in hair disorders.

This case report describes a 60-year-old woman with Cronkhite-Canada syndrome whose symptoms and polyposis improved following prednisolone therapy, but emphasizes the need for periodic digestive tract screening due to associated cancer risks.

This study found that during the early pandemic months of 2020, there was a significant increase in dermatological conditions linked to stress and behavioral changes compared to the same period in 2019.

This case report describes a patient with Cronkhite–Canada syndrome, where immunosuppression and nutritional support led to disease remission.

Reflectance confocal microscopy can noninvasively diagnose onychomatricoma by showing unique features different from healthy nails or nail fungus.

This review discusses skin appendages like hair and nails as indicators of local and systemic pathologies, emphasizing conditions such as inflammatory diseases and infections, but reports no new clinical findings.

This review discusses various skin-related conditions affecting hair and nails, highlighting associations with systemic pathologies but reports no new clinical findings.

This study found that trichohyalin is expressed in various normal and pathological epithelia beyond hair follicle cells, where it is uniquely associated with filaggrin, suggesting a specific role in aggregating K6/K16-containing intermediate filaments.

This study reported that alopecia areata mostly affects young Black African males, with very few associated pathologies observed in this population.

This review discusses the physiological skin changes during pregnancy and reports no new clinical results, emphasizing the importance of distinguishing these changes from pathological conditions.

In this descriptive study, elderly patients most commonly presented with skin wrinkling, xerosis, and eczematous conditions, highlighting the difficulty in distinguishing normal age-related from pathological skin changes.

This article reviews various skin changes and conditions during pregnancy, noting that while many are normal, some can become pathologic, but it reports no new research findings.

Older adults commonly experience wrinkles, itchy skin, psoriasis, fungal infections, skin growths, grey hair, hair loss, and nail ridging, but no skin cancer was found in this group.

This article reviews various "white diseases" characterized by hypopigmentation or depigmentation and emphasizes the role of melanosomes in skin and eye color, but it does not present new clinical results.

This review discusses normal skin changes during pregnancy such as pigmentary and glandular alterations, highlighting the need for physician awareness to avoid unnecessary treatments, and reports no new clinical findings.

This review discusses hair keratins and hair follicle-specific epithelial keratins and their association with inherited hair disorders, reporting no new clinical results.

This study analyzed the cornified envelope of epidermal proteins, finding keratins dominate, which may help explain the minimal impact of deleting genes for single envelope components in congenital ichthyosis.

The document concludes that understanding nail anatomy is key for diagnosing nail diseases, early signs of nail melanoma may allow for less aggressive treatment, and specific genetic mutations are important in thyroid cancer prognosis and treatment.

This review discusses recent advances in the genetic understanding of inherited hair and nail disorders and reports no new clinical results.

Different nail disorders are treated by targeting their specific causes and using appropriate medications or protective measures.

This study investigated demographic and clinical characteristics of twenty-nail dystrophy in Korea, identifying differences in subtype and gender predominance between children and adults.