Regardless of the treatment be sure that you understand how to follow his instructions. Be sure you understand how to take any prescribed medications. Understand the details of any changes in your diet he may prescribe. If the doctor limits a certain activity, understand the details of those limitations and the consequences of not heeding the limitations. This is all to say understand your treatment so that you can be an active partner in your healing.
Doctors are healers as well as resources.
They want to heal you and they want to talk to you. Do not be afraid of the doctor and do not take every thing a doctor says as gospel. If something does not sound right or does not sit well, say so and explain why you feel that way. The situation could be that there was a miscommunication between you and the doctor and expressing your concern can remedy that. Remember that the doctor is not a high authority figure for you to be intimidated by.