A black line on your nail (medically known as melanonychia) causes a streak of dark pigmentation that runs along the nail bed. It can be a normal color variation, especially in people with darker ...

A dermatologist has warned that a specific mark on your nail could be a sign of a serious health problem – so it's important to consult a medical professional fast ...

It is called longitudinal melanonychia and can have multiple causes. According to the expert, you should be particularly cautious if it the line appears on a single nail. Dr Barrutia continued ...

Hannah Lee is a celebrity manicurist. Splinter hemorrhage (nail trauma) Fungal infection Melanonychia Melanoma Not all marks ...

Beau’s lines are horizontal indentations or ridges across fingernails or toenails, sometimes with a yellowish tint. They indicate an interruption in nail growth, often due to illness, injury, or other ...

While dactylitis refers to nonspecific inflammation of a finger or toe, blistering distal dactylitis specifically refers to a periungual infection, most often caused by group A hemolytic ...

Zhang, X. and Zeng, X. (2025) Diagnostic Challenges and Multidisciplinary Management Strategies for Manicure-Induced ...