Gallstones are stones found in the gallbladder, an organ which stores the bile for digesting fats. The stones can be as small as a grain of sand or as large as a pingpong ball. Gallstones form because of too much cholesterol and hence are common among people who are obese. These stones cause problems when it blocks the duct in the gallbladder which causes pains in different parts of the body including the stomach, belly, shoulder area and lead to fever and chills. Aside from surgery to remove the stone, another common approach to treating gallstones is through natural means. Among the most popular natural remedies for gallstones is the black seed oil. This oil is extracted from the seeds of a plant called Nigella Sativa which are known as fennel flower, nutmeg flower and black caraway. This flowing plant is native in South and South West Asia such as India, Bangladesh as well as in Russia, Turkey, Egypt, and the Middle East.