[Hot stone & oil course] A hot stone oil massage on the back relieves deep stiffness and promotes blood flow. The far infrared rays of the hot stones warm the body from the inside, providing a highly relaxing effect. It has the same effect as a bedrock bath, so your body will remain warm for a while after the treatment. Because the massage is performed while your body is warm, it is more effective than a regular hand massage. The stones used in hot stone therapy are called ba