Strange symptoms may be caused by COVID-19 in China

During the COVID-19 outbreak in China this time, some people claimed there are strange symptoms such as constantly farting and crying, some people's face and tongue turned black, and some people even had gray hair overnight after being diagnosed positive for COVID-19. This has aroused great concern. Although there has been no official conclusion, a series of self-published news by people in the context of a serious pandemic in China has caused panic. It is feared that the virus variant in China is different.