Essential oil can penetrate deep into the skin, dredge meridians, decompress and relax, and even play a role in physical therapy. As the saying goes, "If it doesn't hurt, it will pass". Opening the back with Ouluya essential oil can relieve pain, activate collaterals, eliminate dampness, reduce pressure, improve muscle tension, relieve shoulder and neck pain, stiff neck and scapulohumeral periarthritis, and improve fatigue, dizziness and poor sleep quality caused by shoulder and neck.