Depends on what your dr has told you or should have told you but based on facts it can be done under general or local anaesthesia (with sedation) as well
More so is done under general anaesthesia
Time taken varies from case to case anywhere from 10
Min to an hour but In private setup would be from half an hour to 45 mins only surgery time
Next Steps
You have to ask ur dr all the details what he is planning to do
Health Tips
Still avoid cold food get all tests done