Symptoms of excess lactic acid in the body mainly manifest as respiratory symptoms, digestive symptoms, mental symptoms, physical symptoms, such as dyspnea, nausea, mental trance, muscle aches and pains. 1. Respiratory system symptoms: it may lead to insufficient oxygen supply, and patients often experience symptoms such as dyspnea or fast and deep breathing. 2. Digestive system symptoms: mainly manifested as loss of appetite, nausea, vomiting, abdominal pain, and so on. 3. Mental symptoms: excess lactic acid in the body does not affect the mind if it is not serious, but if it is serious, it will often lead to patients in a trance, confusion, or even coma. 4. Physical symptoms: When a large amount of lactic acid accumulates in the muscles and joints, it often causes soreness in the muscles and joints. Too much lactic acid in the body may also lead to muscle weakness, convulsions, drowsiness, etc. If these symptoms should be timely to the hospital, a clear diagnosis and standardized treatment as prescribed by the doctor.