In complementary medicine, massage is regarded as an essential and effective method of maintaining good health and relieving pain. It improves the circulation of blood, lymph and energy throughout the body, it benefits the immune system and assists the elimination of waste products. Massage and touch therapies also cause endorphins to be released in the body, which contributes to a sense of physical and emotional well-being. There are numerous health benefits including; relaxation of the nervous system, joint and muscle flexibility, relief from pain and tension, stimulating organ and tissue functioning and it can also be used to assist weight loss and improve skin tone. There are many Oriental massage traditions, some of which have been modified in modern times. The two main groups of massage are those that apply pressure through clothing and those that use oils on the skin.