What could be the matter and what kind of doctor should I see for help? There are two common types of muscle injuries, strains and sprains. A muscle strain is an injury that affects muscles or tendons, which are the thick bands that connect muscles to bone. A muscle sprain is an injury that affects ligaments, which are thick bands that connect bone to bone. Sprains can range in severity from a mild stretch to a complete tear.
A food additive made from the sap of the acacia tree, gum arabic, also called acacia gum, is harvested from wild trees in the Middle East as well as parts of Africa and west Asia. Gum arabic is added to a wide variety of foods, acting as a stabilizer to help bind the foods together, and when used in larger quantities can be a source of soluble fiber.
Answer: Originally, chewing gum was made from the  latex sap of the sapodilla tree (native to Central America). This sap was called chicle. Other natural gum bases may be used, such as sorva and jelutong. Sometimes beeswax or paraffin wax is used as a gum base. After World War II, chemists learned to make synthetic rubber, which came to replace most natural rubber in chewing gum (e.g., polyethylene and polyvinyl acetate). The last U.S. manufacturer to use chicle is Glee Gum. In addition to the gum base, chewing gum contains sweeteners, flavorings, and softeners. Softeners are ingredients such as glycerin or vegetable oil that are used to blend the other ingredients and help prevent the gum from becoming hard or stiff.