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

Black lines on a nail can have various causes, from normal color variation to injury, medication side effects, or health conditions. They are typically due to melanonychia or splinter hemorrhages ...

The majority of nail discoloration is caused by infections ... Do you see thin red or brown lines? They’re called splinter hemorrhages. They usually come from trauma to your nails or a fungal ...