Origin of the name 'patchouli' (Huo Xiang) and its history

Patchouli herb has been used in the major medical systems of the world, viz. traditional Chinese medicine and Ayurveda for both external and  internal applications. In Chinese medicine, it has been used for centuries as decoction with other drugs for treating cold, nausea, diarrhoea, dermatitis, vomiting, abdominal pain, headache, fever, dampness and to stimulate appetite. In India, in the ancient times, leaves of the patchouli plant had been primarily used as insect repellent to keep insects away from garments.