Stones of all shapes and sizes and varying temperatures, ranging from zero to 140 degrees, are used during hot stone massage therapy to elicit physical healing, mental relaxation, and a spiritual connection to earth energy. Warm stones encourage the exchange of blood and lymph and provide soothing heat for deep-tissue work. Cold stones aid with inflammation, moving blood out of the area, and balancing male/female energies. Stones are placed in varying positions on the body for energy balancing or may be used by the therapist for specific trigger-point work. The alternating heat and cold of thermotherapy brings the entire body into the healing process, with a rapid exchange of blood and oxygen and alternating rise and fall of respiration rate as the body seeks homeostasis.