Why do toenails turn black? Here are some of the reasons why toenails turn black

The reason why nails turn black is mostly due to disease factors. There are many diseases that can cause this phenomenon. Everyone must find the cause of the disease and then take the right medicine according to the doctor's advice.

1. Blackening of the nails and broken spots under the nails indicate infection-induced myocarditis (severe heart infection), other heart diseases, or bleeding disorders.

2. Brittle nails may indicate iron deficiency, thyroid problems, impaired kidney function, or blood circulation problems.

3. Brittle, soft and easily worn nails indicate a lack of nutrition and may indicate hyperthyroidism.

4. Black nails and/or thin, flat, spoon-shaped nails are signs of vitamin B12 deficiency or anemia. (If your hands come into contact with detergents or allergens, your nails may also turn black or gray.)

5. Dark blue nails indicate lung obstruction, such as asthma or emphysema.

6. Inward-deepening nail tips indicate abnormalities in the heart, liver, or respiratory system.

7. In addition to local fungal infections, green nails can also indicate bacterial infections in the body.

8. Half-white nails with black spots on the fingertips may indicate kidney disease.

9. Isolated green streaks appearing on the nail bed, especially on fair skin, is a sign of skin cancer.

10. Beaded nails (uneven surface) are a sign of rheumatoid arthritis.

11. Nails that extend to the fingertips and curve downward are a sign of lung damage, such as emphysema or asbestosis.

12. Easy to break, crack, or peel off indicates malnutrition and lack of hydrochloric acid and protein. Minerals are also extremely deficient at this time.

13. If the base of the nail is raised and the white part is very small, it means there is a respiratory disease, such as emphysema or chronic bronchitis. This symptom may be hereditary.

14. Separation of the nail from the nail bed suggests thyroid disease or localized infection.