I know there have been dozens of threads suggesting lavender oil, letting air to the area, patting dry and all the other usual ideas, BUT...
I went to see my gynae surgeon yesterday. 9 months ago I required a full 3a degree restitch after my daughter was born last May (first birthday on Friday n'aww, anyway I digress...). I went back because my perineum, despite fully healed, was occasionally sore and irritated. She advised, and yes I said "OMG" too, but to go for a full brazilian wax!
Any scar will be irritated or indurated if hairs are in the way, they will cause ingrowns which in their own way will cause inflammation and potentially infection, in the worst case scenario causing the scar to open up. She said (and I trust her with my life as she is Lead Directing Consultant of one of the UK's largest tertiary referral unit for gynae issues), all women are obviously different in regard to pubic hair but to make sure the area is as hair free as possible to allow scar tissue to heal as best it can without other irritations.
So ladies, I've had several Californians in the year my daughter's been born, but tomorrow I'm going the whole hog!...