“What types of surgery require general anesthesia?”

Major abdominal surgery
Head/neck surgery
Thoracic surgery
Neuro surgery

It depends on many factors. First of all, whether the area that the surgical procedure involves can use a different type of anesthesia (for example, neuraxial anesthesia, i.e., spinal of epidural). Second, whether the surgeon requires muscle relaxation for the procedure, in which case not only that you would need general anesthesia, but also to have a "breathing tube" as you go to sleep and that usually comes out when you wake up. There are also instances where you can have general anesthesia and all the medication is given through the IV catheter that you will have anyway. So, without knowing exactly what the procedure is and long it takes, there are many scenarios for it. Hope this answers your question.

Almost all major surgeries - head surgeries, brain surgeries, chest surgeries - require general anesthesia.