Vaginal itchiness is real, especially after having a 4th degree tear and episiotomy with my first born. I had well over 15 stitches internal and external and the constant itch from healing was literally killing me (on top of constant bleeding, swelling etc).
The only thing that helped me through the healing process was Witch Hazel! Either lightly dabbed on with drenched cotton wool pad OR frozen as an ice cube/soak a ladies sanitary pad on witch hazel (it will swell in size) then freeze and place in your knickers against affected area.
Pure heaven and for under $10 super affordable!