A member asked:

What might cause horizontal ridges on the fingernails?

6 doctors weighed in across 2 answers

It depends: Changes in fingernails can be indicative of an underlying medical disorder. Ridges or bumps can be related to iron deficiency. Anemia, lupus, heart disease, and thyroid disorders can also can changes to the fingernails. Fungal infection also can cause bumps and discoloration of the nailbed.

Answered 1/24/2018

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Dr. Heidi Fowler answered

Specializes in Psychiatry

Horizontal Ridges: (Beau's line) have a variety of possible causes: 1. nail injury (biting nails, crush injury or pressure to nail in runners). 2. Chemicals (some nail polish removers. 3. ) Infections- yeast/ fungus, viral warts. 4. Skin cancer (malignant melanoma). 5. Renal, liver, thyroid diseases, Raynaud's Disease. 6. arsenic poisoning or silver overdose 7. malnutrition. 8. Zinc Deficiency.

Answered 11/3/2018

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