Hysan Muscle Comfort Oil (Huo Luo Oil) is a fully licensed essential massage oil with 100% natural ingredients. Hysan Pharmaceutical is a well-known household name in Hong Kong and is a manufacturer of massage oils, creams and ointments. The oil can be used to accompany massage treatments to help promote blood flow and tissue repair. The oil can be used to accompany massage treatment to help promote blood flow and tissue repair in the clinic. It can also be used for all kinds of aches and pains, as well as for insect bites and headaches.