When the mouth is bitter in the morning, you need to find the cause according to the patient’s symptoms, the common causes are as follows: 1, medical diseases: more common, such as diabetes can cause bitter mouth, because the blood sugar metabolism is in a state of imbalance, can cause a variety of problems, such as bitter mouth, you can improve the symptoms through blood sugar control; 2, oral diseases: gingivitis, periodontitis can also cause bitter mouth, at this time can be through the oral surgeon’s examination If there is redness and swelling of gums, calculus, etc., it is clear. If there are the above problems, the inflammation will be eliminated through the treatment of dentistry, and the symptoms of bitter mouth can disappear; 3, gastrointestinal tract malfunction: If the gastrointestinal tract peristalsis is poor, it can lead to bile reflux and cause bitter mouth. You can also adjust the function of the gastrointestinal tract through physical exercise and apply gastrointestinal motility drugs such as morpholine to make peristalsis proceed smoothly, thus eliminating the symptoms.