Usually, surgery is performed in a state where the patient does not fall asleep completely and is easily awakened even after anesthesia. However, if the patient is struggling or snoring is severe, the patient is woken up and anesthetized again.
However, I was struggling so much that I woke up, anesthetized, and repeated. It was too risky to do any more anesthesia, so I just had the surgery while I was awake, and I almost passed out. Of course, I fell asleep occasionally, so I wasn't fully awake during the entire surgery! (I was awake all the time) If I had, I would have died in pain..