I had some work awhile back and would repeat it tomorrow in a heartbeat to get rid of the cause. It's certainly not the most pleasant experience but my recollection is that the initial entry with the device which holds it open for the work is a little more unpleasant than the other part. Depending on how bad, you may need to take painkillers after. Assuming your doctor is kind and caring, grin and bear it; you'll be glad you did.