The doctor during the delivery of my daughter applied oil and massaged the area, but I don't know what kind of oil it was. I also had the stinging and told her I felt like I was going to tear, which she said was the 'ring of fire', but I ended up tearing terribly anyway. I can only imagine, though, what it would have been like without the oil.
I would call your doctor's office or the L&D area of the hospital where you're going to deliver and ask if the oil is an option and if they provide it or what they would suggest.
Congratulations in advance!