Hundreds of years ago in North America, the indigenous tribes lived in close connection with nature, and they relied on nature's herbs to maintain their health. One day, a young hunter in the tribe, named Telka, was accidentally injured during a hunt and his arm was scratched by a sharp rock. His wound began to become inflamed and painful, and as time went on, the skin around the wound began to become red and swollen, and even pus appeared. Telka felt increasingly weak and could not continue hunting and taking on daily work.

The tribal witch doctors soon realized that this was not just a simple wound infection, but might also be accompanied by a fungal infection. In order to treat it, the witch doctors found a mysterious plant called Usnea. Usnea is a moss plant that grows on tree trunks and mosses. It has a unique shape, is green or gray-green, and feels soft and tough. Its antifungal and antibacterial properties have long been discovered by the elders of the tribe and are widely used in trauma disinfection and skin infection treatment.

After finding a treatment method. So, the witch doctors collected usnea, gently mashed it and boiled it with water to concentrate it into a liquid medicine. Then, they carefully applied the usnea liquid medicine to Telka's wound, and even applied fresh usnea to the injured skin for compressing. After a few days, Telka's wound improved significantly, and the inflammation and pain gradually subsided. The antifungal effect of usnea began to show, the infection around the wound was effectively controlled, and Telka recovered.

Telka's treatment story quickly spread among the tribe, and usnea became an important herb, widely used in the treatment of trauma, infection, and skin diseases. The herbalists of the tribe regarded usnea as a sacred herb, mastered the secrets of its use, and passed this knowledge from generation to generation.