What are some systemic diseases and disorders that damage nails?

Systemic diseases and disorders that can damage nails include:

1. Psoriasis: A chronic skin condition characterized by red, itchy, and scaly patches on the skin. It can also affect the nails, causing them to become thick, brittle, and crumbly.

2. Lichen planus: A chronic inflammatory skin condition that can affect the skin, nails, and mucous membranes. It can cause the nails to become thin, brittle, and ridged.

3. Alopecia areata: An autoimmune condition that causes hair loss on the scalp and other parts of the body. It can also affect the nails, causing them to become thin, brittle, and pitted.

4. Fungal infections: Fungal infections, such as onychomycosis, can cause the nails to become thick, discolored, and crumbly.

5. Bacterial infections: Bacterial infections, such as paronychia, can cause the nails to become swollen, red, and painful.

6. Anemia: Iron deficiency anemia and other types of anemia can cause the nails to become brittle, spoon-shaped, and pale.

7. Thyroid disease: Thyroid disorders, such as hypothyroidism and hyperthyroidism, can affect the nails, causing them to become brittle, thin, or ridged.

8. Diabetes: Diabetes can cause nerve damage and poor circulation, which can lead to nail problems such as thickening, discoloration, and fungal infections.

9. Raynaud's disease: Raynaud's disease is a condition that affects blood flow to the fingers and toes. It can cause the nails to become brittle, discolored, and painful.

10. Connective tissue disorders: Connective tissue disorders, such as lupus and rheumatoid arthritis, can affect the nails, causing them to become thin, brittle, and ridged.

11. Liver disease: Liver diseases, such as cirrhosis and hepatitis, can cause the nails to become thin, brittle, and yellow.

12. Kidney disease: Kidney disease can cause the nails to become thin, brittle, and white.

It's important to note that nail changes can be a sign of an underlying medical condition. If you notice any changes in the appearance or texture of your nails, it's a good idea to see a doctor or dermatologist for evaluation and appropriate treatment.