Here's the recipe my former MW gave me...
Post-partum Herbal Bath
1/2 c comfrey
1/2 c shepherds purse
1/2 c uva ursi
1/2 c sea salt
1 bulb garlic
Add everything but garlic to a big pot of water, heat to barely breaking a boil, then reduce heat to barely a simmer. Meanwhile peel and crush the cloves of garlic. After 20 minutes of simmer, remove from heat, strain out herbs, and add crushed garlic.
You can add the "tea" directly to the bath, refrigerate for later use, or soak cloths in it for compresses, or soak pads in them to freeze for postpartum use.
If you want to use it right away draw a bath hot enough for momma's comfort and add the PPHB. It will start out light tea color and darken almost to black as it oxidizes. As the bath cools you can put the baby in. Most babies find it very relaxing and it encourages them to nurse. It's also wonderful for newborn skin and cord stump.

I was never excited about it as I've never had a damaged perineum. What convinced me it was such a great thing was the responses of the women I've made these baths for who've suffered extensive tearing. Their effusive gratitude was embarrassing *but* it showed me how effective the PPHB was.
~BV