The main purpose of soap is to dissolve and allow us to easily wash away the compounds of skin secretions that we call “dirt.” However, since ancient times, soap has also been used for medicinal purposes. It was used to disinfect bruises, abrasions, and even suppurating wounds; it was introduced into body cavities like modern suppositories; it was rubbed into the knees and into painful joints. This book contains medicinal recipes based on soap that can be used at home to cope with various skin and joint diseases.