病来如墙倒, 病去似抽丝

病来如墙[山]倒, 病去似[若]抽丝 [bìng lái rú qiáng dǎo bìng qù sì chōu sī]

1. ■ Illness comes as fast as a wall falling down， but goes as slowly as unraveling a cocoon.; Ague comes on horseback, but goes away on foot.