Traditional Korean medicine (Hangul: 한의학(Hanuihak), Hanja: 韓醫學) or (Hangul: 향약 (Hyangyak), Hanja: 鄕藥) refers to the traditional medicine practices that originated and developed in Korea.
Korean medicine traditions originated in ancient and prehistoric times and can be traced back as far as 3000 B.C. when stone and bone needles were found in North Hamgyong Province, in present-day North Korea. In Gojoseon, where the founding myth of Korea is recorded, there is a story of a tiger and a bear who wanted to reincarnate in human form and who ate wormwood and garlic. In Jewang Ungi (제왕운기), which was written around the time of Samguk Yusa, wormwood and garlic are described as 'edible medicine', showing that, even in times when incantatory medicine was the mainstream, medicinal herbs were given as curatives in Korea. Medicinal herbs at this time were used as remedial treatment such as easing the pain or tending injury, along with knowing what foods were good for health. Moreover, wormwood and garlic are not found in ancient Chinese herbology, showing that traditional Korean medicine developed unique practices and inherited them from other cultures.
In the period of the Three Kingdoms, traditional Korean medicine was influenced by other traditional medicines such as ancient Chinese medicine. In the Goryeo dynasty, a more intense investigation of domestic herbs took place: The result was the publication of numerous books on domestic herbs. Medical theories at this time were based on the medicine of Song dynasty, but prescriptions were based on the medicine of the Unified Silla period such as the medical text First Aid Prescriptions Using Native Ingredients or Hyangyak Gugeupbang (향약구급방), which was published in 1236. Other medical journals were published during this period like Introductory Guide to Medicine for the General Public or Jejungiphyobang (제중입효방).