The nails are an excellent indicator of fitness. Other issues can happen in the nails and can mean structural or skin conditions. Look out for something that looks odd on or under your fingernails or toenails, which doesn’t seem natural. Your safest course of action is to visit a doctor at the earliest opportunity.

Six conditions can cause signs in the nails too. However, it is vital to see a doctor for a diagnosis, which can take into account many things, including the symptoms of the tooth.


Hair is closely related to fingernails and toenails. Much like your hair can fall out after an illness or a prolonged period of stress, so do your nails display these signs as well. Stress can most likely allow side to sidelines to show on your fingers.

Moles or Melanoma

One of the most frequent concerns dermatologists receive is a question over the color of the nails. Discoloration typically happens in lines extending from cuticle to tip, which may be benign moles or cancerous melanoma. African-Americans and Asians are more likely to undergo variations in natural, racial pigmentation.

If the skin beneath the nail plate — the rough section of the body, which protects the fingertips — produces dark colors, you can see a dermatologist. Such advances are often more of a problem as they involve a single finger rather than anything. Dark lines extending through the cuticle can be a symptom of melanoma. Moles are likely to affect the ones that end at or below the epidermis.


Arthritis can occur in small cysts that develop on or on the cuticles. These are benign (not cancerous) and are best treated by a hand surgeon.


Typically, this common skin disorder is marked by dark, scaly spots, but it may also damage fingernails and toenails, says Dr. Poblete-Lopez.

You can contact your dermatologist if you have yellow-red discoloration on your finger, also called a “hair drop” or “salmon mark” Many signs may suggest psoriasis, too:

Indentations: on the nail plate, nicks, or holes, which is the hard part of the nail covering the fingertips.

Lines of Beau: Lines that run side by side around the tooth.

Thickening of the skin/loosening of the tooth: Thickening of the skin under the tooth, which will dislodge the nail from the nail pad. It usually starts at the tip, then progresses into the cuticle.

Black areas: Distinct white spots, also called leukonychia, on the fingers. (The blurry white stains that often occur on the fingernails and toenails do not fall under the group and are not of concern.

Black lines: small clots or splinter hemorrhages or dilated and broken capillaries-possible signs of psoriasis-may be black lines extending from tip to cuticle.

Redness: Another potential symptom of psoriasis is the usually light regions below the cuticle turn red, which may be caused by congested capillaries.

Kidney Disease

Several variations in the nail can suggest the existence of acute or chronic kidney disease.

Lines from Beau: This side-to – sidelines can be a symptom of acute kidney failure.

Ridged fingers: Also called koilonychia, in the case of kidney disease, there may be rough fingers with ridges. Such fingers, too, are often spoon-shaped, which concave and may lead to anemia of iron deficiency.

White streaks/spots: Similar to cases of psoriasis, distinct white streaks, and nail spots can lead to chronic kidney disease.

Darier Pathology

Darier disease is a rare genetic condition that causes rashes to the skin that often occurs in puberty. It shows up as long, white or reddish stripes in the fingernails and toenails that extend from cuticle to tip. A V-shaped nick below the fingertip can also suggest the disorder.


It’s not always easy to avoid underlying problems that affect your skin, so by keeping hydrated and maintaining a well-balanced diet, you can care for your skin. Be sure you are eating enough vitamin B and zinc as those nutrients significantly improve your nails.

Changes to the nails may be natural in many situations and do not lead to any undiagnosed differences in health. But if you have a concern, it’s still better to contact the doctor.

Any nails may not look straight or may have longitudinal lines or ridges. As long as anything you see is consistent throughout the nail’s distribution, this is probably OK. When, however, there’s something out of the ordinary, visiting a dermatologist is wise.

Types of nail deficiency

One of the most widely mentioned nail issues is hard, cracking nails and can also break quickly. They’re often seen more often in kids. Officially called onychoschizia, nail splitting, or brittle nails caused by repeated wetting and drying of your fingernails, so when you get your hands wet, you should use gloves, such as when you’re doing dishes.

The fix: You should try adding lotions containing lanolin or alpha-hydroxy acids. If this isn’t enough, see a doctor. Norris states that hypothyroidism, like iron deficiency, can also cause thin, brittle nails.

Soft or weak 

Until snapping the nails crack quickly or bent. Soft nails can be caused by overexposure to moisture or chemicals — think about detergent, cleaning fluids, nail treatments, and removing nail polish.

The Fix: Should not have toxins under your hands. Go healthy and give your nails a chance to regenerate. A deficiency in vitamins C, Calcium, magnesium, or fatty acids is most often associated with weak nails. Norris states that it is best not to take iron as a replacement when you know that you’re in a low alternative. Instead, start taking a multivitamin, which includes vitamins Calcium, and B.