Dr R Castillo - What are your nails telling you about your health? By Niña Elyca J. Rabada, Fingernails provide clues to what medical condition you may be experiencing. Take a few
![Darren Brown on Twitter: "Since having #LongCovid I've lost some of the lunula (half moons) on my fingernails. Also my nails are now no longer smooth and have new ridges. What on Darren Brown on Twitter: "Since having #LongCovid I've lost some of the lunula (half moons) on my fingernails. Also my nails are now no longer smooth and have new ridges. What on](https://pbs.twimg.com/media/EqZVAkCXIAEQsKc.jpg:large)
Darren Brown on Twitter: "Since having #LongCovid I've lost some of the lunula (half moons) on my fingernails. Also my nails are now no longer smooth and have new ridges. What on
![half and half nail syndrome | capillaroscopy,nailfold capillaroscopy, fingernail under microscope,nail fold capillaroscopy,nailfold capillary microscopy half and half nail syndrome | capillaroscopy,nailfold capillaroscopy, fingernail under microscope,nail fold capillaroscopy,nailfold capillary microscopy](http://www.nail-fold-capillaroscopy.com/wp-content/uploads/2017/10/half-and-half-nail-syndrome-0.jpg)
half and half nail syndrome | capillaroscopy,nailfold capillaroscopy, fingernail under microscope,nail fold capillaroscopy,nailfold capillary microscopy
![Possible association between polycythemia and half and half nails - Kado - 2020 - Journal of Cutaneous Immunology and Allergy - Wiley Online Library Possible association between polycythemia and half and half nails - Kado - 2020 - Journal of Cutaneous Immunology and Allergy - Wiley Online Library](https://onlinelibrary.wiley.com/cms/asset/bbc261f1-d28e-4ca5-94d7-ab6b9e8f0d85/cia212129-fig-0001-m.jpg)