Why is there a horizontal line on my nail?

A. You may be referring to Beau’s lines, which are grooves that run horizontally across the nail plate. They usually develop when nail plate growth, which begins in the nail matrix (located under the cuticle), is temporarily disrupted.

Are Beau lines harmless?

Signs and symptoms Beau’s lines are horizontal, going across the hairline, and should not be confused with vertical ridges going from the bottom (cuticle) of the nail out to the fingertip. These vertical lines are usually a natural consequence of aging and are harmless.

How long can you live with subungual melanoma?

The survival rates can get lower depending on how advanced the condition is when diagnosed and treated. If subungual melanoma is diagnosed at its final stage, or Stage IV, the survival rate is 15% to 20% at five years and 10% to 15% at 10 years.

What is 1 black line underneath your fingernail mean?

A narrow black line that has formed vertically underneath your nail is called a splinter hemorrhage. It occurs for a variety of reasons and may be harmless or a sign of a more serious health condition. This condition is called a splinter hemorrhage because it may look like a wood splinter under your nail.

What does black line under your fingernails mean?

Facts about Black Lines in Your Fingernails. Dark lines that run from the cuticle to the tip of the nail can indicate the presence of nail melanoma; a condition that could mean either a benign or a malignant tumor. Beau’s lines. A symptom of this condition is a dark line that runs across the breadth of the nail.

What does it mean to have a black line down fingernail?

Another cause of black lines on the nails is a splinter hemorrhage, which occurs when blood vessels under the fingernail are damaged, often due to injuries, such as hitting. More seriously, a black line or lines on the nails can indicate the presence of melanoma, a dangerous form of skin cancer.

What causes the black line on the nail?

Black lines on the nail can be the result of many conditions. Trauma is one of the most common causes of splinter hemorrhages. This can occur when something hurts your nail bed and bursts a blood vessel under your nail. You may also experience nail trauma without even realizing it, such as when you squeeze something very tightly.