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I have a black line under my fingernail in my left thumb What is that

It's just your thumb, don't worry about disease or syndromes or vitamin/mineral deficiency. Are you a darker skinned person? That would be entirely normal. On the other hand-

Melanonychia (also referred to as melanonychia striata) is brown or black pigmentation of the nail plate. It commonly takes 2 forms: diffuse melanonychia or longitudinal melanonychia (LM). The most important cause of melanonychia is subungual melanoma (SM), although other causes include physiologic LM, systemic causes, trauma, inflammatory disorders, fungal infections, drugs, and benign melanocytic hyperplasias (eg, nevi, lentigo).

and it looks like the picture on the right:http://www.mmt-fr.org/IMG/jpg/naevus-matriciel-6.jpg

ALWAYS vertical and whole nail. So if it doesn't look like that, think little trauma to vessel under nailplate....

What does black lines mean on fingernails

Consider the following :


Splinter hemorrhages can be a sign of heart problems, but generally are a different thing all together. They are mostly caused by tiny voids in the nail plate cell production. They fill up with blood from the nail bed and appear as tiny black lines that look much like you have a splinter under your nail. Your nail plate will ride forward on the nail bed much like a train rides forward on its tracks. The rails are on the nail bed, and the grooves are on the underside of the nail plate. The voids are usually on the underside of the nail plate which allows them to fill with blood from the nail bed. They usually are nothing to worry about unless there is a history of heart problems in your family. If so, then I would have a stress test performed if your doctor believes it to be warranted.
it is caused by vitamin C deficiency or endocarditis (which is a heart disease).

Black, splinter like bits under the nails can be a sign of infectious
endocarditis, a serous heart infection; other heart disease; or a bleeding
disorder

I have a thin black pencil like line under my nail freaking out

No - it is probably nothing - you could have mashed it w/o being aware of it - If it bothers you - see a Dr. -- but I seriously doubt it is anything -- but why would you freak out about something-before you even know for sure what it is? Dont' borrow stress and worry -- check it out and know for sure!

I have small black lines under my nails help please

What Your Nails Say About Your Health
Nail color and texture can reflect a wide range of medical conditions.

Take a good look at your fingernails and you may notice subtle variations in the texture or color - a touch of white here, a rosy tinge there, perhaps some rippling or bumps in the surface. These imperfections may not look like much to you, but to the trained eye they can provide valuable clues about your overall health.

"Just like the eyes are the window to the soul, so are the nails," says Tamara Lior, MD, a dermatologist with Cleveland Clinic Florida. Lior says she once convinced a patient to have his lungs checked after noticing a bluish tint to his nails, a sign that he wasn't getting enough oxygen. Sure enough, he had fluid in his lungs.

Warning signs for many other conditions, from hepatitis to heart disease, may also appear in the nails, according to Joshua Fox, MD, director of Advanced Dermatology and a spokesman for the American Academy of Dermatology. "Changes in the nails can be a sign of a local disease like a fungus infection or a sign of a systemic disease like lupus or anemia," Fox tells WebMD.

He says he sometimes tries to guess if a person has anemia by looking at his or her nails. He explains that pale, whitish nail beds may indicate a low red blood cell count consistent with anemia.

An iron deficiency can cause the nail bed to be thin and concave and have raised ridges.

While most of Fox's patients don't come in to report nail problems, he often checks their nails anyway. "The nails offer many little clues to what's going on inside you. Lupus patients get quirky, angular blood vessels in their nail folds. Psoriasis starts in the nails up to 10% of the time" and causes splitting and pitting of the nail bed.

Heart disease can turn the nail beds red. Obsessive-compulsive disorder can show up in the nails through persistent nail-biting or picking, Fox says.

Even common disorders like thyroid disease can cause abnormities in the nail beds, producing dry, brittle nails that crack and split easily.

He lists the following 10 examples of nail changes that could indicate a serious medical condition.

What Your Nails Say About Your Health: 10 Possible Signs of Serious Conditions

White nails Liver diseases, such as hepatitis
Yellowish, thickened, slow-growing nails Lung diseases, such as emphysema
Yellowish nails with a slight blush at the base Diabetes
Half-white, half-pink nails Kidney disease
Red nail beds Heart disease
Pale or white nail beds Anemia
Pitting or rippling of the nail surface Psoriasis or inflammatory arthritis
"Clubbing," a painless increase in tissue around the ends of the fingers, or inversion of the nail Lung diseases
Irregular red lines at the base of the nail fold Lupus or connective tissue disease
Dark lines beneath the nail Melanoma

What causes those black lines to grow in your fingernails

&^&^&^

Take your choice dookter.
Or for a consult ...

Did you know you can tell a lot about a person by looking at their nails? Not just what their shade of polish is, or whether they do heavy housework or not by the nail length. We're not just looking at cosmetics here, but rather at unpolished nails and seeing if they have anything to say about health.

(As always, it is important to note that this is provided to be purely informative, and under no circumstances should one take this information and use it for self-diagnosis. If you are concerned or suspect you may have any condition, see your doctor immediately.)

Nails are our protection for the nerves in our fingertips, while toenails protect toes from damage or injury. They are part of the skin layer and are made up of a protein called keratin.

A healthy blood supply will create a peachy-pink nail bed. If there is a deficiency or physical problem within our bodies, the fingernails can show it.

What are some of the problems that an show up on the nails, and what are the signs?

Discolored nails: Diabetes, stress, allergies and simple illness can cause your nails to appear discolored. A greenish nail color, however, can be a sign of infection, either in the nail bed or in your system.

Bluish nail beds can be a sign of lung trouble, such as emphysema or even asthma. A simple dark blue line in the nail can be a sign of skin cancer. Tiny black streaks can indicate a heart problem, while reddish-brown spots can indicate a deficiency of folic acid, protein or vitamin C.

Yellowing nails are early signals of various internal disorders, such as diabetes, respiratory or liver problems. White lines in or across the nail can signal fever, liver or heart disease, kidney disorders or, more likely, a lack of iron or zinc in your diet.

We see what the color of our nails has to say, but what about the shape, texture and overall condition?

Nail shapes: Nails that tend to curl under at the tips can signify respiratory or heart problems, while nails that are raised at the base can also signal respiratory trouble. Square, wide nails can be a result of a hormonal disorder while flat, thin nails can be from insufficient vitamin B12.

The texture of fingernails can tell as much about a persons general health as the color can. Below are some common texture abnormalities and what they can possibly indicate.

Nail textures: Vertical ridges that appear on the nail can indicate disorders as simple as iron deficiency, poor absorption of vitamins and nutrients, overall poor health or they could indicate something as serious as kidney trouble. (So, you see why consulting your physician is so important.) These vertical ridges, as well as bumpy nails, can also suggest that one is prone to developing arthritis. Ridges running horizontally across the nail can indicate physical or mental stress.

Nutrition plays an extremely important role in every function of our bodies, right down to the tips of our fingers and toes, literally. As well as signs of other possible disorders, nails can let us know how we add up when it comes to getting all of our required nutrients.

Since nails are mainly made up of protein, they can immediately alert us to a lack of it in our diet. White lined bands across the nail beds can signal a protein dificiency. You can get protein from beans, oats, seeds, nuts, eggs and lean meats.

Calcium is also important for healthy nails. Without it, the nails lose their strength and become brittle and dry. You can find calcium in green leafy vegetables, dairy products, sesame seeds or even a daily supplement.

As mentioned before, ridges in the nails can be a result of vitamin deficiency, one of which is the B vitamins. Vitamin B is needed for strengthening, while vitamin B12 also strengthens while promoting normal nail growth and healthy coloring.

Vitamin C is another necessary vitamin. Adequate intake can help prevent hang nails and swelling of nail tissue, and a frequent occurance of either of these symptoms is a good indication of a deficiency.

Probably the most common sight on the nails is the "white spot". Although it has been noted that white lines can be symptoms of a serious disorder, their presence is more than likely a result of iron or zinc deficiency. Before worrying about any severe disease, your first step should be to see your doctor and have him/her test your levels of iron and zinc. Zinc supplements are easily found in any pharmacy while additional iron intake needs to be monitored by your physician.

The best way to assure yourself of healthy nails is to eat a well balanced diet. You'll need plenty of protein as well as fresh fruits and vegetables. Sufficient water intake is also important, for as well as keeping the rest of you healthy it provides moisture for nails. If you feel you are still not getting enough essential vitamins and minerals it is recommended that you take a comprehensive supplement.


Hindsight is 20/20 but Foresight is 20/13