1. Go to the anesthesiology department or pain department, neurology department, orthopedics department, rehabilitation department, oncology department and other outpatient clinics in regular large hospitals when you encounter pain. Generally, acute and chronic pain can be controlled promptly and satisfactorily; 2. Make an evaluation after at least three consecutive outpatient visits, because even the most brilliant doctors cannot solve the problem or play an obvious therapeutic effect in one outpatient visit; 3. Bring complete medical records and examination data; 4. Tell the doctor the real condition and cooperate with him/her in every examination and treatment; 5. Provide timely feedback on the reaction after taking medication and consult at any time if you do not understand the problem.