Medicine before the 20th Centurty

The idea I get of medicine before the 20th Century, makes me think of home remedies. Whenever I get a headache or break out in cold sweats, my mother always requires me to use a cold or hot compress to cease the ache or sweat. Before medications like antibiotics, came to surface, I'm sure that hot or cold compresses were used, in addition to things such as leeches, or substances that came out of plants.