Nail myths, set straight
White spots, breathing nails, faster growth after cutting: some beliefs about nails refuse to fade. Here is what is really going on.
Nails attract a surprising amount of folklore. Beliefs about them are passed from one generation to the next, repeated in salons and shared online until they sound like common sense. Some are harmless, others lead people to spend money on the wrong things or to worry about the wrong signs. Here are six of the most persistent, set straight.
Myth: white spots mean you need more calcium
The facts: small white spots or flecks on the nail are very common, and they have a medical name, . They are usually caused by minor knocks to the , the living tissue under the skin at the base of the nail where the nail is made, not by a lack of calcium.
Because the knock often happens some time before the spot becomes visible, most people never connect the two. Like the rest of the nail, the spot grows forward and is eventually trimmed away. If white areas cover much of the nail, keep appearing without an obvious reason or come with other changes, show them to a doctor.
Myth: nails need to breathe
The facts: this may be the most repeated line in nail care, usually offered as a reason to take a break from polish. Nails do not need to breathe. The nail plate is dead keratin, and oxygen and nutrients reach the nail matrix and nail bed through the blood supply, not through the surface.
When nails look tired after months of colour, the cause is usually something else. Deeply pigmented polishes can leave a yellowish tint on bare nails, which a base coat helps to prevent, and rough removal of gel or polish can thin the nail plate. A pause from polish can still be pleasant, but it does not let the nail take in air.
Oxygen and nutrients reach the nail matrix and nail bed through the blood supply, not through the surface.
Myth: cutting your nails makes them grow faster
The facts: cutting nails does not make them grow faster. Growth happens at the nail matrix, at the base of the nail and hidden under the skin, and trimming the free edge at the tip does not change what the matrix does.
Part of the confusion may come from the fact that well kept nails break less often. Regular trimming and filing remove small splits before they travel, so nails can seem to reach a good length more easily. That is a real benefit, just not a faster one.
Myth: nails keep growing after death
The facts: it is a favourite of horror stories, but nails and hair do not keep growing after death. Growth needs living cells and a working blood supply. What actually happens is that the skin dries out and retracts, which can make nails and hair look longer than before.
The myth is old and widely repeated, which is a large part of its staying power. It is also a useful reminder that what we see is not always what is happening: a change in the surrounding skin can make a nail look different without the nail itself changing at all.
Myth: ridges always mean something is wrong
The facts: fine vertical ridges, running from the base of the nail towards the tip, are common and become more frequent with age. On their own they are usually nothing to worry about, and a ridge-filling base coat can even out the surface before you apply colour.
Horizontal grooves across the nail are a different matter. Known as , they can appear after an illness or an injury, when nail growth was briefly disturbed. If they appear without a known cause, they are worth showing to a doctor.
Myth: gelatin or a hardener will fix weak nails
The facts: eating gelatin for stronger nails is an old piece of advice, but there is little evidence that it works. The same caution applies to the idea that any single product can transform weak nails. Everyday care is the more reliable starting point: gloves for wet work, regular moisturising and keeping brittle nails shorter.
Nail hardeners deserve a closer look, too. Some contain formaldehyde, which can cause allergic reactions. This is where label claims come in. A polish marked is made without toluene, formaldehyde and dibutyl phthalate; 5-free and higher numbers exclude further ingredients. Read the label, stop using any product that makes your skin or nails react, and see a dermatologist if a reaction does not settle.
The common thread through all six myths is simple. A nail is made at the matrix and changes only as new nail grows out, so both quick fixes and alarming signs deserve a calm, informed look. When something about a nail genuinely worries you, a dermatologist is the right person to ask.
Glossary
- Punctate leukonychia
- Small white spots on the nail, usually caused by minor knocks to the nail matrix.
- Nail matrix
- Living tissue under the skin at the base of the nail that produces the nail plate.
- Beau’s lines
- Horizontal grooves across the nail that can appear after an illness or an injury.
- 3-free
- A label for nail polish made without toluene, formaldehyde and dibutyl phthalate.
Questions and answers
Should I worry about ridges on my nails?
Fine vertical ridges are common and become more frequent with age, and on their own they are usually not a concern. Horizontal grooves across the nail, known as Beau’s lines, can appear after an illness or an injury. If they appear without a known cause, or if your nails change in other ways, show them to a doctor or dermatologist.
What do labels like 5-free mean?
A 3-free polish is made without toluene, formaldehyde and dibutyl phthalate. Labels with higher numbers, such as 5-free, exclude further ingredients on top of those three. The exact list can differ from one product to another, so check the ingredients if you have a known allergy, and stop using any product that causes a reaction.
Do white spots mean I am unhealthy?
Usually not. Small white spots are most often caused by minor knocks to the nail matrix, and they grow out with the nail. They are not a sign of a lack of calcium. If white areas spread, cover large parts of the nail or appear together with other changes, it is sensible to ask a doctor to take a look.
