The more prominent symptoms of metabolic acidosis are respiratory symptoms, such as deepening and speeding up of breathing and ketone odor when exhaling, etc. In addition, patients may also have related symptoms in the digestive system, circulatory system and nervous system. In addition, patients can also be accompanied by symptoms related to the digestive system, circulatory system and nervous system, the details are analyzed as follows. 1. Digestive system: abdominal pain, diarrhea, nausea, vomiting, loss of appetite and so on. 2. Circulatory system: the main manifestations are arrhythmia and weakening of heart muscle contraction. 3. Nervous system: mainly manifested as drowsiness, coma, dull or irritable sensation, impaired consciousness and so on. Metabolic acidosis is a common acid-base imbalance in the clinic, once found, it needs timely consultation and treatment to avoid further aggravation of the condition.