Were there any medieval 'cures' that actually worked?

by RugbyTime
Searocksandtrees

you've asked this before.. is there a specific kind of treatment you're asking about?

Rewording the question to be more specific, e.g. country/culture, tighter timeframe, medical conditions, classes of treatment (surgery, bone-setting, ointments..) etc could result in more/better/in-depth responses