Why does nails turn black

A narrow, vertical black line on your nail is called a splinter hemorrhage. Lines that create a horizontal stripe are called Beau's lines. Subungual hematoma is the medical term for bleeding and bruising under the nail. What causes this, and what are the treatment options? Normal, healthy nails appear smooth and have consistent coloring. As you age, you may develop vertical ridges, or your nails may be a bit more brittle. This condition is contagious and can spread to the….

Health Conditions Discover Plan Connect. Black Toenail. Medically reviewed by William Morrison, M. What makes a toenail turn black? What causes black toenail? When should you see your doctor?

Can a black toenail cause complications? What are the treatments for black toenail? What is the outlook for a black toenail? Start by seeing your doctor; they will be able to rule out serious medical problems and help you figure out what is going on. Zocdoc Answers is for general informational purposes only and is not a substitute for professional medical advice.

If you think you may have a medical emergency, call your doctor in the United States immediately. Always seek the advice of your doctor before starting or changing treatment. Need coronavirus guidance? Check out our resources. List your practice on Zocdoc. Orthotics 10 Subscribe via RSS. Bones 7 Subscribe via RSS. Plantar fasciitis 5 Subscribe via RSS. Uncategorized 4 Subscribe via RSS. Contest 2 Subscribe via RSS.

Podcasts 1 Subscribe via RSS. Infographics 1 Subscribe via RSS. Achilles tendonitis 1 Subscribe via RSS. Refer a friend Refer a Friend. Contact Us Contact Us Please complete all required fields! First Name: Name is required. Last Name: Name is required. Melanonychia , which overall remains a relatively rare modern society ailment, is as a side effect of taking medication. In cases where the medication contains fluoride or Cytoxan, the person taking such medication may develop black discolorations beneath some or all of the nails.

A much more serious possible cause of black nails is melanoma.