Hot stone massage is a type of massage that uses heated stones to help relax the muscles and ease tension. The therapist places smooth, flat stones on specific points of the body, such as the back, legs, and shoulders. These stones are usually made of basalt, a type of volcanic rock that retains heat well. Many people report feeling deeply relaxed and centered after the treatment. The heat from the stones can also help to improve circulation, ease pain, and reduce inflammation. However, hot stone massage may not be appropriate for everyone, particularly people with certain medical conditions or who are pregnant.