I've also used it on my thumb when I cut my hand while slicing a lemon. I almost never suture. I quit suturing when an old granny midwife reminded me that tears have been healing just fine for 1,000s of years. Yunnan Payou is a homeostasis and can be taken immediately after childbirth to stop a hemorrhage. I have also used honey to hold the vagina together when no herbs are available.
Tears vary in degrees.
First degree is almost nothing more than a chaffing and will heal on its own. A second degree tear may require a stitch or two, or you may decide that you don't need stitches at all, just get out the old handy super glue, apply to the edges of the tear, hold edges together for 15 - 20 seconds, and go on your merry little way. But they're so incredibly unlikely without forceps or episiotomies. These tears would require going to the hospital for stitches as they can extend beyond the perineum, and into the rectum. If you have a unassisted birth, I don't think you have a lot to worry about with tears, as you will be at home, and will be able to push your baby out according to what you are feeling, not what someone else is telling you that you have to push, and push hard.