The suction and negative pressure provided by cupping can loosen muscles, encourage blood flow, and sedate the nervous system (which makes it an excellent treatment for high blood pressure). Cupping is used to relieve back and neck pains, stiff muscles, anxiety, fatigue, migraines, rheumatism, and even cellulite. For weight loss and cellulite treatments, oil is first applied to the skin, and then the cups are moved up and down the surrounding area. This treatment is also valuable for the lungs, and can clear congestion from a common cold or help to control a person's asthma. In fact, respiratory conditions are one of the most common maladies that cupping is used to relieve. Cupping’s detoxifying effect on skin and circulatory system is also significant, with a visible improvement in skin color after three to five treatments. Cupping removes toxins and improves blood flow through the veins and arteries. Especially useful for athletes is cupping’s potential to relieve muscle spasms. Cupping also affects the digestive system. A few benefits include an improved metabolism, relief from constipation, a healthy appetite, and stronger digestion.