There are three main branches of Oriental medicine, acupuncture, Chinese herbal medicine, and Qigong exercises (energy cultivation). The main objective of each branch is to bring about a smooth flow of Qi and to balance the organ systems. Some other clinical techniques include gwa-sha (gentle & painless skin scraping), cupping (vacuum therapy), moxibustion (heat therapy), liniments for pain & trauma, Tui Na, and external Qigong (energy work).