What does white spots mean on nails? And what are their causes?

You may notice the appearance of some white spots on your nails from time to time , you probably think that it refers to health problems such as calcium deficiency , but this belief is wrong according to specialists .
Dr. Jessica Krant says :

Calcium deficiency causes white spots on nails is the most common myth followed by the myth of zinc deficiency , the truth is that these spots are common and harmless and do not indicate any deficiency, as Dr. Andrew Weil says :

This spot is also called Leukonychia , which is common after injuries, he says :
Most often, these patches are simply a sign of a previous injury to the base of the nail and over time these spots or lines appear after the injury of about 6 weeks , you may have forgotten it, and sometimes it may be the result of a nail polish that presses on the nail base.
As Dr. Andrew Weil says : These spots may be the result of allergic reactions to nail polish or mild inflammation, although the infection is temporary but the stains remain with the nail growth and may need up to 8 months to disappear depending on the speed of growth of your nails .

When should I worry?

Worry only when a dark spots appear on the nail without a prior injury , Dr. Marcia Gorder says :
Beware of dark spots, but if you hit your hand lately with a car door for example, you don't have to worry too much , but the appearance of dark spots black or brown or purple without a prior reason only have to be careful and you should go to the doctor directly because it is probably a sign of skin cancer , when you see a white spot on your fingernail next time, remember if you hit your finger with something, don't worry, it's not dangerous.