1. Onychomycosis: This is a fungal infection of the nail that can cause the nail to turn white or yellow. It can also cause the nail to become thick and brittle.
2. Trauma: If you injure your nail, it may turn white due to bleeding under the nail. This is usually temporary and the nail will return to its normal color over time.
3. Nutritional deficiencies: A deficiency in certain vitamins and minerals, such as zinc or biotin, can cause the nails to turn white.
4. Liver disease: White nails can be a sign of liver disease, such as hepatitis or cirrhosis.
5. Kidney disease: White nails can also be a sign of kidney disease, such as chronic kidney failure.
6. Certain medications: Some medications, such as chemotherapy drugs, can cause the nails to turn white.
7. Aging: As we age, our nails may become thinner and more brittle, and may also turn white.
If you notice that your nails have turned white, it's important to see a doctor to determine the cause and receive appropriate treatment.