Hmm i had an episiotomy with DS and it took quite some time to heal. I also had a skin tag that didnt help, but it took me a good several months and still then DTD was still sometimes quite tender. I guess when you think about it, it is a large cut that needs to heal. Make sure you give yourself plenty of time to heal before attempting DTD. Massaging the area in a warm bath or even otherwise, can help toughen the area up again.