According to Healthline, a splinter hemorrhage is a "narrow black line that has formed vertically underneath your nail." It can look black or reddish brown in color, doesn't change appearance when you ...

When the acrylic was removed, I noticed a dark brown line under ... cause for nail disorders. Does your diet contain plenty of calcium and iron? Animal protein in the form of red meat, chicken ...

Also, the cuticular seal of the nails should be intact, and the nail plate should adhere to the nail bed, says Dr. Thomas ...

A 57-year old woman had her pinky toe amputated after a dark spot she thought was a mole ... said she had noticed the spot under the nail of her pinky toe months before, and wasn't concerned ...