Getting up with a bitter mouth and dry mouth is common in the evening too little water, diet too salty, but also in some diseases, such as diabetes, dry syndrome, gallbladder disease. 1. Wake up bitter and dry mouth, mostly due to dinner eat too much, too salty, less water, the body is in a state of water shortage, get up after the mouth dry, bitter. 2. Wake up bitter mouth dry also seen in some diseases, such as diabetes, unstable blood sugar control, sleep at night, the amount of urination will increase significantly, the body water supplementation is insufficient, appearing bitter mouth, dry mouth; suffering from dry syndrome, the glands in the oral cavity to reduce secretion, oral dryness, resulting in a dry mouth, bitter mouth, etc.; suffering from gallbladder disease, bile reflux, will also result in the cause of dry mouth, bitter mouth. Causes get up dry mouth, bitter mouth for many reasons, you can first try to adjust the diet, such as light diet, eat more fresh fruits and vegetables, drink more water to relieve, such as can not be relieved, to the hospital in a timely manner.