Eat warm cooked foods rich in fiber. Drink lots of fluids and prune juice. Perineum or the pelvic floor muscles can be exercised to return muscle tone. Do this in sitting, standing or lying position with legs slightly apart. Close and draw up around the back passage as though preventing a bowel action then repeat around the front two passages as though preventing the flow of urine.
Some natural births have perineal tears.
Drinking liquids every hour or 30 minutes after birth. Standing for a while hours after birth. Bathe with the postpartum herbal formula soaking in the tub. Keep your legs together. Expose your skin to air and sun for 15-20 minutes in the morning and afternoon.