One of the UK's leading experts in coronavirus has shared a picture of a symptom of Covid he says is increasingly common.
Professor Tim Spector, epidemiologist at King's College London and lead scientist on the Zoe Covid Symptom Study UK Infection Survey, said one in five patients are now presenting with uncommon symptoms.
Taking to Twitter, he said: "One in five people with Covid still present with less common symptoms that don't get on the official PHE list - such as skin rashes.
"Seeing increasing numbers of Covid tongues and strange mouth ulcers.
"If you have a strange symptom or even just headache and fatigue stay at home!"
The most common symptoms of Covid are a cough, a fever and a loss of sense of taste or smell.
But people have also reported other symptoms - including fatigue, confusion and an upset stomach.
The vast majority of people who test positive for coronavirus do not have any key symptoms on the day of their test, a study has suggested.
Some 77% of people who had a positive test had no symptoms on the day of their test, while 86% did not have a cough, temperature or loss of taste/smell.
Researchers led by Professor Irene Petersen at University College London (UCL) analysed data from the Office for National Statistics (ONS) coronavirus infection survey, which has been testing thousands of households every week regardless of whether people have symptoms.
The analysis looked at data for 36,061 people who had a test between the end of April and the end of June.
