What 'COVID nails' reveal about your body's fight against the virus

Some people notice unusual changes in their nails after a COVID-19 infection. These so-called 'COVID nails' can appear days or weeks later and may signal the body’s response to the virus. Experts say they are not a diagnosis but a possible after-effect of the illness. One common sign is Beau’s lines, which are horizontal dents or ridges on the nails. These can develop due to the stress COVID-19 places on the body. However, they may also result from severe emotional stress or other illnesses.

Other changes include Mees’ lines, which are white stripes across the nails. A red half-moon shape may also appear around two weeks after a COVID-19 diagnosis, possibly indicating infection. These nail alterations are temporary and grow out naturally over roughly six months.

While nail ridge filler or coloured polish can hide these symptoms, they do not affect the underlying cause. Medical professionals remind the public that having COVID nails does not confirm immunity or remove the need for precautions. COVID nails serve as a visible reminder of the body’s reaction to the virus. They fade as new nail growth replaces the affected areas. Regular nail checks can still offer useful health insights, but they should not replace standard safety measures.