8 citations,
May 2021 in “Journal of the European Academy of Dermatology and Venereology” A COVID-19 patient had unusual nail discoloration and nail separation possibly due to the virus's effects on small blood vessels.
3 citations,
August 2022 in “Cutis” Certain nail conditions can suggest thyroid problems, with different symptoms for underactive (slow, thin nails) and overactive (spoon-shaped, brittle nails) thyroid.
February 2010 in “Journal of The American Academy of Dermatology” A woman's nail separation was likely caused by poor blood flow, and a treatment for similar conditions might help.
2 citations,
September 2015 in “Türk pediatri arşivi : İstanbul çocuk kliniği dergisi” Valproic acid can very rarely cause nail separation, which usually gets better on its own after stopping the drug.
2 citations,
October 2021 in “Journal of skin and stem cell” Nail disorders are often related to jobs like housework and manual labor, with cosmetic issues being the main concern, and are commonly caused by skin diseases like psoriasis.