In the past, herbs were the only cure for the disease, and learning about herbs was based only on human experience. They found the medicine in their environment, where they learned to recognize the plants and to determine how to use it. Knowledge and experience have been passed down from generation to generation, so today there are many who, thanks to the knowledge and experience of their loved ones, have become successful users and growers of medicinal plants, although unfortunately some of the knowledge about medicinal plants has probably fallen into oblivion, given that no one ever wrote it down.