bìng​lái​rú​shān​dǎo​bìng​qù​rú​chōu​sī

illness comes fast and leaves slowly

病来如山倒,病去如抽丝 病來如山倒,病去如抽絲 bìng​lái​rú​shān​dǎo​bìng​qù​rú​chōu​sī
illness comes fast and leaves slowly
Sickness comes like a landslide, but goes slowly like spinning silk; an idiom used to describe how quickly one can fall ill and how long the recovery process often takes.