Hot stones are a type of massage therapy that involves the use of heated stones to relax and soothe the body. The stones are usually made of basalt, a type of volcanic rock that retains heat. The therapist places the stones on specific points on the body to help relieve tension and promote relaxation. The term 'hot stones' is often used in combination with the word 'ICE, ' which refers to the use of cold stones in massage therapy.