A bowel transit time test measures how long it takes for food to travel through the digestive tract. Bowel transit time depends on what types of food you eat and how much you drink. Different people have different bowel transit times.
Some of the comorbid or associated medical symptoms for Stiffness in jaw may include these symptoms: 1  Intermittent jaw pain. 2  Pain in jaw. 3  Severe jaw pain on one side. 4  Face symptoms. 5  Head symptoms. 6  Nerve symptoms. 7  more associated symptoms...Â».
Jaw muscle problems. Jaw fatigue, tightness, and achiness are common jaw muscle symptoms. They may be constant or only felt when the jaw is moved. Such symptoms can make it difficult to open the mouth. Common muscle disorders can also affect the jaw. Jaw myofascial pain is pain that comes from muscle and surrounding tissue.