An Omicron symptom that you can spot on your skin could indicate that you need urgent treatment.
The new strain of Covid-19 could show in your skin, lips and nail beds, according to the American Centre for Disease Control and Prevention (CDC).
Pale, grey or blue-tinged skin could be an indicator of low oxygen levels in your blood, Birmingham Live reports.
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So if you notice these symptoms, the CDC advises that you should seek immediate medical attention.
The main symptoms of Omicron are fatigue, sneezing, mild aches as well as a scratchy throat and a runny nose.
Other strains of the virus include symptoms such as a persistent cough, high temperature or fever and sudden loss of taste or smell.
Cases of the new variant have surged since December, becoming the dominant Covid-19 strain in the UK.
But it has been confirmed to be a milder strain of the virus, as Prime Minister Boris Johnson said in a Covid-19 announcement on January 4.
Mr Johnson added that Plan B restrictions will remain in place as cases continue to reach new records.
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New cases across Leicester and the wider county have been as high as around 3,000 each day in the last week.
The city has surpassed a total of 80,000 Covid-19 infections since the cases were first recorded in 2020.
As children return to schools it is expected that a higher number of cases of people in isolation will further impact already struggling sectors, including local healthcare.