An anesthesiologist is a doctor who specializes in blocking pain. They do this with drugs called "anesthetics." These drugs block the pain of childbirth. They can put you into a deep sleep for surgery. And they can help you manage pain from injury and chronic conditions.
Because of their specialized nature, anesthetics must be used with care. So your anesthesiologist asks you a lot of questions. They want to know the basics, like how much you weigh and what you've had to eat and drink. They may check your heart and lungs. They ask about any issues you've had with drugs in the past. Your anesthesiologist uses all of this info to find the type of drug to give you. They decide how much is safe.
After they give you a pain-blocking drug, the anesthesiologist watches you closely. They monitor your vital signs during surgery. They keep you pain free during treatment. They keep you comfortable as you recover.
Your anesthesiologist is a key part of your care team. For more info about anesthesia, talk to your doctor.