Abnormal taste is a condition in which there is an abnormality in the functioning of the sense of taste. This suggests that you may have some diseases, such as hepatitis, digestive system dysfunction, gastritis, and so on. 1. Hepatitis: If the patient’s mouth is often accompanied by a bitter taste, it may be suffering from hepatitis. This is mainly due to the abnormal metabolism of bile. The heat in the liver and gallbladder makes the liver damaged, which further leads to abnormal bile secretion and excretion. 2. Digestive system dysfunction: If the patient feels that there is often a sweet taste in the mouth, even drinking plain water feels sweet, it may be caused by digestive system dysfunction. This is mainly due to the dysfunction of the digestive system, which makes the secretion of various digestive enzymes in the digestive tract abnormal, especially the secretion of salivary starch content increased. 3. Gastritis: If the patient often feels a salty taste in the mouth, it is likely to be suffering from gastritis. This is mainly due to long-term diet or diet irregularity makes the stomach acid reflux, and often accompanied by symptoms of indigestion, which is easy to make the mouth salty. There are also other reasons for abnormal taste, so it is advisable to consult a doctor according to your situation.