'COVID nails' may reveal past infections—but not immunity
Changes to fingernails, sometimes called 'COVID nails', have been linked to recent coronavirus infections. These alterations can appear days or weeks after catching the virus. While they may signal past illness, experts stress they do not indicate immunity or replace vaccination. One noticeable sign is a red half-moon shape near the nail base. This often shows up around two weeks after a COVID-19 diagnosis. Another possible indicator is Beau’s lines—horizontal dents or ridges that form when nail growth slows due to stress on the body. These lines can also develop after other major stressors, such as emotional trauma or serious illness.
Some people may see Mees’ lines, which are smooth white bands running across the nail. Like Beau’s lines, these can follow a COVID-19 infection. The changes are not permanent and will grow out naturally over roughly six months.
For those concerned about the appearance, nail products can temporarily hide the marks. However, dermatologists advise taking occasional breaks from polish or artificial nails to maintain nail health. Regularly examining natural nails can also offer clues about broader health conditions. COVID nails serve as a visible reminder of the body’s response to infection. They do not confirm immunity or remove the need for precautions like masking and vaccination. Anyone noticing unusual nail changes should monitor their health and consult a doctor if other symptoms arise.
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