Hello lybrate-user! For oral thrush
of your baby you can give one homeopathy medicine-Borax-30- 2 times for 4 days and simply
inside the mouth. For your case if there is sore and cracked nipple you can take this homeopathic medicines- Graphites-30 - 3 times for 6 days, Phytolacca-30- 3 times for 6 days. You too apply simply glycerin over that area.