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Doctor insights on: What Causes Black Lines In Fingernails

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What causes black vertical lines under fingernails? I am asking for a 66 yr. Old male.

What causes black vertical lines under fingernails? I am asking for a 66 yr. Old male.

Blood clots: Tiny blood clots, usually broken off from heart valves then float to the end arteries of the fingertips and get caught in the capillaries of the nail bed. They are not dangerous in and of themselves, but could be reflective of a heart problem. ...Read more

Fingernails (Definition)

Fingernails are the hard coverings at the end of fingertips. Nails are made out of a protein called keratin. They function to protect the fingertip and to increase sensitivity of touch. Good hand hygiene and nail care is important to prevent bacterial ...Read more


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What causes dark lines under fingernails?

Injury: Trauma and some illnesses can do this. Remember that nails are related to hair but grow more slowly so that an injury to them may show up over time.
I often see this in my oncology patient with certain chemotherapy. They well have lines in the nails. ...Read more

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What causes fingernails to fall off occasionally?

What causes fingernails to fall off occasionally?

Varies: The cause of fingernails falling off can be secondary to trauma, infection, or other systemic diseases. ...Read more

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What would cause horizontal ridges on fingernails?

What would cause horizontal ridges on fingernails?

Beau's lines: 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. This can occur with direct injury to the nail matrix; an inflammatory condition such as psoriasis; infection around the nail plate; repetitive picking at the nails or cuticles; or sickness. ...Read more

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What causes these vertical ridges in my fingernails?

Many reasons: Vertical ridges on nails are basically harmless & can be related to heredity, aging, & nail dryness or injury. The appearance of ridges may be reduced by regular moisturizing of the nail & cuticle & avoidance of harsh soaps that are drying. Nail appearance can reflect overall health and nutrient status so supplementation may help. Consider fish oil, biotin, &/or a multivitamin with minerals. ...Read more

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Why do fingernails twist as they grow and cause pain?

Why do fingernails twist as they grow and cause pain?

Fingernail problem: There are many reasons for the deformation of the fingernails. Among these are some very important systemic diseases. Many facets of fingernail growth are assessed by dermatologist when she or he he looks at them. See a dermatologist now. No excuses. ...Read more

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What might cause horizontal ridges on the fingernails?

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. ...Read more

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What are the white marks on your fingernails caused by?

What are the white marks on your fingernails caused by?

Can be a lot: Fingernail disorders can be wide and varied as far as causes. Dermatologists are experts in fingernail diseases. White markings, called leukonychia, can be caused by trauma, infections, drugs, or other systemic diseases. ...Read more

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Why do some people not have fingernails? What causes that?

Anonychia: Anonychia (Absence of nails) can be due to a number of causes such as: Anonychia congenita, Ectodermal defect Ichthyosis Allergic contact dermatitis Raynaud's phenomenon Trauma Lichen planus Exfoliative dermatitis & Epidermolysis bullosa. ...Read more

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One of my fingernails is turning black and they all have ridges.. ...what could be causing this?

One of my fingernails is turning black and they all have ridges.. ...what could be causing this?

Nail issues: The best thing would be to have it checked out as it could be anything from fungal infection to injury or other disease. If you have ridges it could also be fungal infection but it is difficult to say without looking at it. See your doctor. If it developed acutely it could be an injury but you would have known it since it would be painful to have it bleed and have the blood underneath turn dark. ...Read more

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What are the vertical ridged striations in my fingernails caused by, and is this cause for alarm?

What are the vertical ridged striations in my fingernails caused by, and is this cause for alarm?

Soft nails: A number of concubines can result in linear striations poor nutritional state, low vitamin levels. Two products which can strengthen the nails are deramanail and genedur. The addition of oral digestive enzymes is useful for strengthening weak nails according dr jonathan wright of the tahoma clinic. ...Read more

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I have a small single black line on the tip of my fingernail. It looks like a small splinter...What could it be?

Splinter hemorrhage: It's called a splinter hemorrhage. If you only have them occasionally, don't worry about it. ...Read more

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I've noticed small/thin black lines keep appearing under the tips of my fingernails over the past few days. What could this be from?

Splinters: Thin longitudinal black lines under fingernails can be what doctors call "splinters" & can reflect tiny blood clot emboli that get caught there, where there are end arteries & capillaries. Such tiny clots end up there after being generated inside left chambers of heart. Cardiologist exam indicated & urgently if dizzy, feverish, chest pain, irregular heart beats or shortness of breath. ...Read more

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What causes bumps in fingernails?

What causes bumps in fingernails?

Varies: Bumps in the fingernails of patients can result from trauma or focal compression on the nail matrix. It can also be a sign of a systemic disease process. Follow with your doctor for further evaluation. ...Read more