White marks on your finger nails can be caused by a few different things. By far the most common cause of white finger nail spots and marks is trauma. If you bump your fingernail up against something and the force was not strong enough to cause a bruise
, then it may show up as a white bump. For whatever reason, some people are more susceptible to these than others. Certain vitamin and mineral deficiencies can show themselves as markings on the finger nails. This can be true for calcium deficiency or iron deficiency. In young people that eat a fairly normal diet, calcium deficiency is a bit uncommon. Iron deficiency should only happen in women who happen to have heavy periods. If this describes you, then you should get your iron levels checked. Finally, people that need to take chemotherapy
or some other drug that hurts the immune system can get white lines across their fingernails
I suggest that you schedule an appointment with your primary care physician
. He or she can take close look at the pattern of markings on your fingernails and determine if this represents repeated minor trauma or if there could be an underlying vitamin or mineral deficiency that needs investigated.