Creeping thyme is in the mint family and has been used for medicinal purposes for centuries by people all around the world. It has been burned for incense and used to treat depression, as well as to provide courage and energy. Essential oils made with thyme have strong antibacterial and antioxidant properties. They are frequently used as mouthwashes and to treat throat infections. They are also used to treat upper respiratory illnesses including whooping cough and bronchitis.