The path a meridian follows as it runs through the body (as well as the location of the points along the meridian) is also used to help diagnose and treat illnesses. For example, LI-4 is known to treat disorders as diverse as the common cold, toothache, stuffy nose, nosebleed, delayed labor, deafness, mumps, excessive sweating or lack of sweat, neck pain, and red-teary-swollen eyes. These are known as channel symptoms and are tied together diagnostically by the fact that the Large Intestine meridian runs through each of the areas affected.