The thyroid gland is hugely important because it is the only means by which your body absorbs iodine to produce a hormone which is necessary for nearly every metabolic function in the body (everything from body temperature regulation and brain development, to converting food into energy).
Sprainâcomplete or incomplete tear in supporting ligaments surrounding a joint caused by a twisting or wrenching motion. Strainâacute or chronic injury to a muscle or tendinous attachment caused by stress, overuse, or over stretching. Classified as mild, moderate, or severe (see Classifying sprains and strains)
Credit: The US Army CC-BY 2.0. The difference between these injuries is not a matter of severity; it is which part of the body is affected. WebMD explains that both fractures and sprains are potentially serious injuries, and they are often hard to tell apart since the damage is internal. According to HowStuffWorks, there are some signs that point to a fracture. Fractures are often accompanied by a loud crack or popping sound when the injury is sustained.