1. Microtrauma
The most common cause is a minor impact or pressure on the nail . This can happen after bumping your finger against an object, after an overly aggressive manicure, or when pushing back cuticles.
These micro-traumas temporarily disrupt keratin formation, leading to the appearance of small white spots.
2. Allergic reactions
Some nail products can cause mild reactions. Harsh nail polishes, removers, or household cleaners can sometimes weaken the nail surface and cause whitish marks to appear.
In this case, it is advisable to limit exposure to these products or to use gentler products.
3. Nutritional deficiencies
Although not the most common cause, certain nutrient deficiencies can affect nail health. A lack of zinc, iron, or certain vitamins can make nails more brittle and promote the appearance of spots.
A balanced diet generally helps to prevent this problem.
4. Infections or diseases
In rare cases, white spots can be linked to a fungal infection , skin problems, or certain internal diseases. However, these cases are much less frequent and are usually accompanied by other visible symptoms.
If the stains persist for a long time or affect several nails, it is best to consult a healthcare professional.
Misconceptions about white spots
A popular belief claims that white spots on the nails indicate a calcium deficiency. However, specialists explain that this idea is largely exaggerated.
In most cases, these marks are simply caused by minor trauma and not by a nutritional deficiency.
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