The condition is a common skin rash that often appears in the summer.
But its cause remains unknown, according to Chinese scientists.
It is caused by the same bacterium that causes rosacea.
The researchers said the virus had been found in samples of the skin of people with dry skin but it was not clear how the bacteria could have spread to them.
The research, published in the journal Science, was conducted by Chinese scientists in Beijing.
It was funded by the Chinese Academy of Sciences.