I have lines down two fingernails which will eventually split. What could this be?

I have lines down two fingernails which will eventually split. What could this be?
Hi.
Mineral deficiency, most probably Silica and B Vitamins. Get some into you. Use vitamin E cream as well to moisten the beds.
Have a great day!
Craig - Naturopath
apparently the nail bed was injured. try vicks vapor rub on the nail at night for a while. remember it has to grow out