2 citations
,
February 2021 in “PubMed” Koilonychia in alopecia areata can improve with oral corticosteroids.
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.
July 2021 in “Clinical Medicine” Iron deficiency without anemia can cause itching and other skin-related symptoms, and iron supplements may help.
June 2025 in “British Journal of Dermatology” Consider amyloidosis in patients with specific nail changes and check for systemic issues.
22 citations
,
April 2006 in “Journal of The American Academy of Dermatology” More research is needed to determine if iron deficiency causes hair loss.