Daily Star's biggest headlines straight to your inbox!A coronavirus patient has been diagnosed with restless anal syndrome which causes him constant discomfort.Doctors in Japan say a 77-year-old man has been struck down by the unpleasant condition since suffering a mild case of Covid-19.It is thought to be the first time 'restless anal syndrome' has been reported as a symptom of the killer virus.The elderly man who has not been named, was being treated at Tokyo Medical University Hospital when he started to complain of insomnia and anxiety.He then 'began to experience restless' and 'deep anal discomfort', doctors say.