If you experience a feeling of bitterness in your mouth, you should be checked to see if you have any stomach problems. Often patients with gastric disease, or patients with bile reflux, may have symptoms of bitterness in the mouth. Because of the dysfunction of the pyloric sphincter, it may cause the bile in the intestinal canal to flow back into the stomach and then back into the mouth, and because of the bile that comes into contact with it, you can feel the symptoms of bitterness in the mouth. There is also a check for oral problems, and often some oral problems can also be felt as bitterness in the mouth. Therefore, it is actually through systematic examination to identify the cause of the disease and carry out targeted treatment. It is also a good choice to consult a Chinese medicine practitioner to take a pulse and look at the tongue and carry out herbal treatment. It is recommended to have a western medical examination first, and then consult a TCM doctor to achieve the purpose of treatment through comprehensive conditioning.